View LTC3428EDD_4110419.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LTC3428 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm x 3mm DFN DESCRIPTIO
The LTC(R)3428 is a 2-phase, current mode boost converter, capable of supplying 2A at 5V from a 3.3V input. Two 93m, 2A N-channel MOSFET switches allow the LTC3428 to deliver high efficiency from input voltages as low as 1.6V. External parts count and size are minimized by a 1MHz switching frequency and a 2-phase design. Two phase operation significantly reduces peak inductor currents and capacitor ripple current, doubling the effective switching frequency and minimizing inductor and capacitor size. External compensation allows the feedback loop response to be optimized for a particular application. Other features include: an active low shutdown pin reduces supply current to below 1A, internal soft-start, antiringing control and thermal shutdown. The LTC3428 is available in a low profile (0.75mm) 10-lead (3mm x 3mm) DFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES

High Efficiency: Up to 92% 2-Phase Control Reduces Output Voltage Ripple 5V at 2A from 3.3V Input 3.3V at 1.5A from 1.8V Input 1.6V to 5.25V Adjustable Output Voltage 1.6V to 4.5V Input Range Internal Soft-Start Operation Low Shutdown Current: <1A Uses Small Surface Mount Components 10-Pin 3mm x 3mm DFN Package
APPLICATIO S

Networking Equipment Handheld Instruments Digital Cameras Distributed Power Local 3.3V to 5V Conversion
TYPICAL APPLICATIO
3.3V to 5V at 2A Converter
95
VIN 3.3V 2.2H* VIN OFF ON 10k 1000pF 22pF SHDN VC AGND PGNDA LTC3428 VOUT SWA SWB FB PGNDB 22F****
3428 TA01
EFFICIENCY (%)
4.7F***
2.2H* VOUT 5V/2A ** 383k
**
121k
* TOKO FDV06302R2 ** PHILIPS PMEG1020 *** TAIYO YUDEN X5R JMK212BJ475MD **** TAIYO YUDEN X5R JMK316BJ226ML
U
U
U
Efficiency vs Load Current
90 85 80 75 70 65 60 55 50 45 0.1 LOAD CURRENT (A)
3428 TA02
VIN = 3.3V VOUT = 5V L = 2.2H 1 2
3428f
1
LTC3428
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW PGNDA SWA VOUT SHDN VC 1 2 3 4 5
11
VIN, VOUT, SWA, SWB Voltage ....................... - 0.3 to 6V SWA, SWB Voltage, Pulsed, <100ns ......................... 7V SHDN, VC Voltage ......................................... - 0.3 to 6V FB Voltage ................................... - 0.3 to (VOUT + 0.3V) Operating Temperature Range (Note 2) .. - 40C to 85C Storage Temperature Range ..................-65C to 125C
10 PGNDB 9 SWB 8 VIN 7 AGND 6 FB
ORDER PART NUMBER LTC3428EDD DD PART MARKING LBBG
DD PACKAGE 10-LEAD (3mm x 3mm) PLASTIC DFN EXPOSED PAD MUST BE SOLDERED TO GROUND PLANE ON PCB TJMAX = 125C, JA = 45C/W, JC = 3C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VIN = 3.3V, VOUT = 5V unless otherwise noted.
PARAMETER Minimum Startup Voltage Quiescent Current, VOUT Quiescent Current, VIN Shutdown Current Switching Frequency FB Regulated Voltage FB Input Current Error Amp Transconductance Output Adjust Voltage NMOS Switch Leakage NMOS Switch On Resistance NMOS Current Limit SHDN Input Threshold SHDN Input Current Maximum Duty Cycle Minimum Duty Cycle Current Limit Delay to Output (Note 3)

ELECTRICAL CHARACTERISTICS
CONDITIONS SHDN = VIN SHDN = VIN SHDN = 0V Per Phase VFB = 1.24V

MIN
TYP 1.5 100 1.3
MAX 1.6 200 2.0 1 1.2 1.268 50 5.25
UNITS V A mA A MHz V nA S V A A
0.8 1.219
1.0 1.243 1 170
1.6 VSWA, VSWB = 5.5V, Per Phase VOUT = 5V, Per Phase Per Phase

0.1 0.093 2 0.4 80 2.5 0.8 0.01 87
2.5
1.5 1 0
40
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC3428E is guaranteed to meet performance specifications from 0C to 70C. Specifications over the -40C to 85C operating temperature range are assured by design, characterization and correlation with statistical process controls.
Note 3: Specification is guaranteed by design and not 100% tested in production. Note 4: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability.
2
U
V A % % ns
3428f
W
U
U
WW
W
LTC3428 TYPICAL PERFOR A CE CHARACTERISTICS
All characteristic curves at TA = 25C unless otherwise noted. SW Pin and Inductor Current in Discontinuous Mode, Demonstrating Anti-Ring Circuit Operation SWA, SWB Switching Waveforms Transient Response, 0.5A to 1.5A
SWA
5V/DIV SWB 500mA/DIV 500mA/DIV
500ns/DIV
3428 G01
Output Voltage Ripple with 22F Ceramic Capacitor
95 90 85
EFFICIENCY (%)
80 75 70 65 60 55 0.05
2.5V TO 5V
RDS(ON) (m)
50mV/DIV
500ns/DIV
3428 G04
SWA, SWB Rise Time, I = 2A
120 110
FB VOLTAGE (V)
RDS(ON) (m)
1V/DIV
10ns/DIV
3428 G07
UW
2V/DIV
100mV/DIV
500ns/DIV
3428 G02
100s/DIV
3428 G03
Converter Efficiency
108 3.3V TO 5V 106 104 2.5V TO 3.3V 102 100 98 96 94 92 90 0.1 LOAD CURRENT (A)
3428 G05
Switch RDS(ON) vs VOUT
1
2
88 2.5
3.0
4.0 4.5 3.5 OUTPUT VOLTAGE (V)
5.0
3428 G06
Switch RDS(ON) vs Temperature
1.27
Feedback Voltage vs Temperature
1.26
100 90 80 70 60 -45 -25 -5
1.25
1.24
1.23
15 35 55 75 TEMPERATURE (C)
95 115
3428 G08
1.22 -45 -25
-5
15 35 55 75 TEMPERATURE (C)
95 115
3428 G09
3428f
3
LTC3428 TYPICAL PERFOR A CE CHARACTERISTICS
Peak Current Limit vs Temperature
3.4 3.2
PEAK CURRENT LIMIT (A)
PI FU CTIO S
PGNDA, PGNDB (Pins 1, 10, 11 (Exposed Pad)): Power Ground for the IC. Tie directly to local ground plane. SWB (Pin 2), SWA (Pin 9): Phase B and Phase A Switch Pins. The inductor and Schottky diodes for each phase are connected to these pins. Minimize trace length to reduce EMI. VOUT (Pin 3): Power Supply Output and Bootstrapped Power Source for the IC. Connect low ESR output filter capacitors from this pin to the ground plane. SHDN (Pin 4): Shutdown Pin. Grounding this pin shuts down the IC. Connect to a voltage greater than 1.5V to enable. VC (Pin 5): Error Amp Output. A frequency compensation network is connected to this pin to compensate the boost converter loop. FB (Pin 6): Feedback Pin. A resistor divider from VOUT is connected here to set the output voltage according to VOUT = 1.243 * (1 + R1 / R2) AGND (Pin 7): Signal Ground for the IC. Connect to ground plane near feedback resistor divider. VIN (Pin 8): Input Supply Pin. Bypass VIN with a low ESR ceramic capacitor of at least 4.7F. X5R and X7R dielectrics are preferred for their superior voltage and temperature characteristics.
4
UW
3.0 2.8 2.6 2.4 2.2 2.0 -45
-25
35 15 55 -5 TEMPERATURE (C)
75
95
3428 G10
U
U
U
3428f
LTC3428
BLOCK DIAGRA W
FB ERROR AMPLIFIER/SOFT-START VIN VC FB
- +
1.243V VOUT CURRENT LIMIT ISENB SWB
ISENB
RAMP/ SLOPE COMP CLK B
- - +
PWM COMP PWM LOGIC DRIVER PGNDB
CHANNEL B OSCILLATOR CHANNEL A CLK A
TSD
SWA RAMP/ SLOPE COMP ISENA SHDN VC AGND 5pF SHUTDOWN CURRENT LIMIT ISENA
3428 BD
+ - -
PWM LOGIC PWM COMP DRIVER PGNDA
3428f
5
LTC3428
APPLICATIO S I FOR ATIO
DETAILED DESCRIPTION
The LTC3428 provides high efficiency, low noise power for high current boost applications. A current mode architecture with adaptive slope compensation provides both simple loop compensation as well as excellent transient response. The low RDS(ON) switches provide the pulse width modulation control at high efficiency. Oscillator: The per phase switching frequency is internally set to a nominal value of 1MHz. Current Sensing: Lossless current sensing converts the peak current signal to a voltage which is summed with the internal slope compensation. This summed signal is then compared with the error amplifier output to provide a peak current command for the PWM. Slope compensation is internal to the IC and adapts to changes to the input voltage, allowing the converter to provide the necessary degree of slope compensation without causing a loss in phase margin in the loop characteristic. Error Amplifier: The error amplifier is a transconductance amplifier with a transconductance (gm) = 1/7.5k. A simple compensation network is placed from VC to ground. The internal 5pF capacitor between VC and ground will often simplify the external network to a simple R-C combination. The internal 1.243V reference voltage is compared to the voltage on FB to generate an error signal at the output of the error amplifier (VC). A voltage divider from VOUT to ground programs the output voltage from 1.6V to 5.25V using the equation: VOUT = 1.243V * ( 1+ R1/R2) Soft-Start: An internal soft-start of approximately 1.5ms is provided. This is a ramp signal that limits the peak current until the internal soft-start voltage is greater than the internal current limit voltage. The internal soft-start capacitor is automatically discharged when the part is in shutdown mode. Current Limit: The current limit comparator in each phase will shut off the N-channel MOSFET switches once the current exceeds the current limit threshold, nominally 2.5A. The current limit delay to output is typically 50ns. The current signal leading edge is blanked for 50ns to enhance noise rejection.
INPUT CURRENT (A)
6
U
Anti-Ringing Control: The antiringing control places an impedance across the inductor of each phase to damp the high frequency ringing on the SWA, SWB pins during discontinuous mode operation. The LC ringing on the switch pin due to the inductor and switch pin capacitance is low energy, but can cause EMI radiation. 2-Phase Operation The LTC3428 uses a two-phase architecture, rather than the conventional single phase architecture used in most other boost converters. The two phases are spaced 180 apart. Two phase operation doubles the output ripple frequency and provides a significant reduction in output ripple current, minimizing the stress on the output capacitor. Inductor (input) peak and ripple currents are also reduced, allowing for the use of smaller, lower cost inductors. The greatly reduced output ripple current also minimizes the output capacitance requirement. The higher frequency output ripple is easier to filter for lower noise applications. Input and output current comparisons for single and 2-phase converters are illustrated in Figures 1 and 2. For the example illustrated in Figure 2, peak-to-peak output ripple current was reduced by 85%, from 4.34A, to 0.64A, and peak inductor current was reduced by 53%, from 4.34A to 2.02A. These reductions enable the use of low profile, smaller valued inductors and output capacitors as compared to a single-phase design.
4.4 4.3 4.2 4.1 4.0 3.9 3.8 3.7 3.6 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 TIME (s)
3428 F01
W
U
U
1 PHASE CONVERTER 2 PHASE CONVERTER
Figure 1. Input Ripple Current Comparison Between Single Phase and Two-Phase Boost Converters with a 2A Load and 50% Duty Cycle
3428f
LTC3428
APPLICATIO S I FOR ATIO
5.0 4.5
OUTPUT (DIODE) CURRENT (A)
4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0
1 PHASE CONVERTER
2 PHASE CONVERTER
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 TIME (s)
3428 F02
Figure 2. Output Ripple Current Comparison Between Single Phase and Two Phase Boost Converters with a 2A Load and 50% Duty Cycle
COMPONENT SELECTION Inductor Selection The high frequency operation of the LTC3428 allows for the use of small surface mount inductors. The inductor ripple current is typically set to between 20% and 40% of the maximum inductor current. For a given set of conditions, the inductance is given as follows:
L
where:
VIN(MIN) * (VOUT - VIN(MIN) ) , L > 2H R * VOUT
R = Allowable inductor current ripple (Amps P-P) VIN(MIN) = Minimum input voltage (V) VOUT = Output voltage (V) For high efficiency, the inductor should have a high frequency core material, such as ferrite, to reduce core losses. The inductor should have a low ESR (equivalent series resistance) to reduce I2R losses and must be able to handle the peak inductor current without saturating. Use of a toroid, pot core, or shielded bobbin inductor will minimize radiated noise. See Table 1 for a list of inductor manufacturers. Some example inductor part types are: Coilcraft 1608 and 3316 series, Murata LQH55D series,
U
Sumida CDRH4D22C/LD or CDRH5D28 series, Toko FDV0630 or D62CB series.
Table 1. Inductor Vendor Information
Supplier Phone Coilcraft Murata Sumida Fax Website www.coilcraft.com www.murata.com www.sumida.com (847) 639-6400 (847) 639-1469 USA: USA: (814) 238-1431 (814) 238-0490 USA: (847) 956-6666 Japan: 81-3-3607-5111 USA: (847) 956-0702 Japan: 81-3-3607-5144 TDK Toko Wurth (847) 803-6100 (847) 803-6296 (847) 299-0070 (847) 699-7864 (201)785-8800 (201)785-8810 www.component.tdk.com www.toko.com www.we-online.com
W
UU
Output Capacitor Selection The minimum value of the capacitor is set to reduce the output ripple voltage due to charging and discharging the capacitor each cycle. The steady state ripple due to this charging is given by: VRIPPLE(C) = 1 IPEAK * (VOUT - VIN(MIN) ) * 2 COUT * VOUT * f
where: IPEAK = Peak inductor current (A) The equivalent series resistance (ESR) of the output capacitor will contribute another term to output voltage ripple. Ripple voltage due to capacitor ESR is: VRIPPLE(ESR) = IPEAK * RESR(C) where: RESR(C) = Capacitor ESR The ESL (Equivalent Series Inductance) is another capacitor characteristic that needs to be minimized. ESL will be minimized by using small surface mount ceramic capacitors, placed as close to the VOUT pin as possible. Input Capacitor Selection Since the VIN pin directly powers most of the internal circuitry, it is recommended to place at least a 4.7F, low ESR bypass capacitor between VIN and AGND, as close to the IC as possible. See Table 2 for a list of capacitor manufacturers.
3428f
7
LTC3428
APPLICATIO S I FOR ATIO
Table 2. Capacitor Vendor Information
Supplier AVX Sanyo TDK Murata Phone Fax
Website
(803) 448-9411 (803) 448-1943 www.avxcorp.com (619) 661-9322 (619) 661-1055 www.sanyovideo.com (847) 803-6100 (847) 803-6296 www.component.tdk.com (814) 237-1431 (814) 238-0490 www.murata.com
Taiyo Yuden (408) 573-4150 (408) 573-4159 www.t-yuden.com
Output Diode Selection For high efficiency, a fast switching diode with low reverse leakage and a low forward drop is required. Schottky diodes are recommended for their low forward drop and fast switching times. When selecting a diode, it is important to remember that the average diode current in a boost converter is equal to the average load current: ID = ILOAD When selecting a diode, make sure that the peak forward current and average power dissipation ratings meet the application requirements. See Table 3 for a list of Schottky diode manufacturers. Example diodes are Philips PMEG1020, PMEG2010, On-Semi MBRA210, IR 10BQ015, Microsemi UPS120E, UPS315.
Table 3. Diode Vendor Information
Supplier Philips Microsemi On-Semi Phone +31 40 27 24825 (949) 221-7100 (602) 244-6600 (310) 322-3332 (949)756-0308 Fax Website www.philips.com www.microsemi.com www.onsemi.com www.irf.com
International (310) 469-2161 Rectifier
Thermal Considerations To deliver maximum power, it is necessary to provide a good thermal path to dissipate the heat generated within the LTC3428's package. The large thermal pad on the IC underside can accomplish this requirement. Use multiple PC board vias to conduct heat from the IC and to a copper plane that has as much area as possible.
8
U
If the junction temperature gets too high, the LTC3428 will stop all switching until the junction temperature drops to safe levels. The typical over temperature threshold is 150C. Closing the Feedback Loop The LTC3428 uses current mode control with internal, adaptive slope compensation. Current mode control eliminates the 2nd order pole in the loop response of voltage mode converters due to the inductor and output capacitor, simplifying it to a single pole response. The product of the modulator control to output DC gain and the error amp open-loop gain equals the DC gain of the system.
G DC = G CONTROL * G EA * G CONTROL = G EA 100 2 * VIN IOUT VREF VOUT
W
UU
The output filter pole is given by:
fPOLE =
IOUT Hz * VOUT * C OUT
where COUT is the output filter capacitor value. The output filter zero is given by:
fZERO =
1 2 * * RESR * C OUT
Hz
where RESR is the output capacitor equivalent series resistance. A complication of the boost converter topology is the right half plane (RHP) zero and is given by:
fRHP =
VIN * RO 2 * * L * VO
2
2
Hz
3428f
LTC3428
APPLICATIO S I FOR ATIO
A typical error amp compensation is shown in Figure 3 and in the Typical Application section. The equations for the loop dynamics are as follow: 1 2 * * 400e 6 * C C1 1 fZERO1 2 * * RZ * C C1 1 fZERO2 2 * * RZ * (C C2 + 5pF ) fPOLE1
5pF
-
+
This zero causes a gain increase with phase lag. With heavy loads, this can occur at a relatively low frequency. For this reason, loop gain is typically rolled off below the RHP zero frequency.
U
VOUT 1.243V FB R1 R2 VC RZ CC1
3428 F03
W
UU
CC2
Figure 3.
3428f
9
LTC3428
TYPICAL APPLICATIO S U
2.5V to 3.3V at 2.5A Converter
2.5VIN 4.7H* 8 SHUTDOWN 4 5 10k 22pF 7 1 1000pF 4.7F VIN LTC3428 VOUT SWA SWB FB PGNDB 3 2 9 6 10 4.7F*** 4x ** ** 205k 4.7H* VOUT 3.3V, 2.5A
SHDN VC AGND PGNDA
121k
* TOKO DC53LC ** MICROSEMI UPS120E *** TAIYO YUDEN X5R JMK212BJ475MD
3428 TA03
3428f
10
LTC3428
PACKAGE DESCRIPTIO U
DD Package 10-Lead Plastic DFN (3mm x 3mm)
(Reference LTC DWG # 05-08-1699)
R = 0.115 TYP 6 0.675 0.05 0.38 0.10 10 3.00 0.10 (4 SIDES) PACKAGE OUTLINE 0.25 0.05 0.50 BSC 2.38 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (SEE NOTE 6) 5 0.200 REF 0.75 0.05 2.38 0.10 (2 SIDES) BOTTOM VIEW--EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 1 0.25 0.05 0.50 BSC 1.65 0.10 (2 SIDES)
(DD10) DFN 1103
3.50 0.05 1.65 0.05 2.15 0.05 (2 SIDES)
0.00 - 0.05
3428f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC3428
RELATED PARTS
PART NUMBER LT1613 LT1615/LT1615-1 LT1618 LT1930/LT1930A LT1946/LT1946A LT1961 LTC3400/LTC3400B LTC3401 LTC3402 LTC3421 LTC3425 LTC3429 LTC3436 LTC3459 LT3464 DESCRIPTION 550mA (ISW), 1.4MHz, High Efficiency Step-Up DC/DC Converter 300mA/80mA (ISW), High Efficiency Step-Up DC/DC Converters 1.5A (ISW), 1.25MHz, High Efficiency Step-Up DC/DC Converter 1A (ISW), 1.2MHz/2.2MHz, High Efficiency Step-Up DC/DC Converters 1.5A (ISW), 1.2MHz/2.7MHz, High Efficiency Step-Up DC/DC Converters 1.5A (ISW), 1.25MHz, High Efficiency Step-Up DC/DC Converter 600mA (ISW), 1.2MHz, Synchronous Step-Up DC/DC Converter 1A (ISW), 3MHz, Synchronous Step-Up DC/DC Converter 2A (ISW), 3MHz, Synchronous Step-Up DC/DC Converter 3A, 3MHz Synchronous Boost Converter with Output Disconnect 5A (ISW), 8MHz, 4-Phase Synchronous Step-Up DC/DC Converter 600mA, 500kHz Synchronous Boost Converter with Output Disconnect 3A (ISW), 1MHz, 34V Step-Up DC/DC Converter 10V Micropower Synchronous Boost Converter 85mA (ISW), High Efficiency Step-Up DC/DC Converter with Integrated Schottky and PNP Disconnect COMMENTS 90% Efficiency, VIN: 0.9V to 10V, VOUT(MAX) = 34V, IQ = 3mA, ISD <1A, ThinSOT Package VIN: 1V to 15V, VOUT(MAX) = 34V, IQ = 20A, ISD <1A, ThinSOT Package 90% Efficiency, VIN: 1.6V to 18V, VOUT(MAX) = 35V, IQ = 1.8mA, ISD <1A, MS Package High Efficiency, VIN: 2.6V to 16V, VOUT(MAX) = 34V, IQ = 4.2mA/5.5mA, ISD <1A, ThinSOT Package High Efficiency, VIN: 2.45V to 16V, VOUT(MAX) = 34V, IQ = 3.2mA, ISD <1A, MS8 Package 90% Efficiency, VIN: 3V to 25V, VOUT(MAX) = 35V, IQ = 0.9mA, ISD 6A, MS8E Package 92% Efficiency, VIN: 0.85V to 5V, VOUT(MAX) = 5V, IQ = 19A/300A, ISD <1A, ThinSOT Package 97% Efficiency, VIN: 0.5V to 5V, VOUT(MAX) = 5.5V, IQ = 38A, ISD <1A, MS Package 97% Efficiency, VIN: 0.5V to 5V, VOUT(MAX) = 5.5V, IQ = 38A, ISD <1A, MS Package 96% Efficiency, VIN: 0.5V to 4.5V, VOUT(MAX) = 5.5V, IQ = 12A, ISD <1A, QFN-24 Package 95% Efficiency, VIN: 0.5V to 4.5V, VOUT(MAX) = 5.25V, IQ = 12A, ISD <1A, QFN-32 Package 96% Efficiency, VIN: 0.5V to 4.4V, VOUT(MAX) = 5.5V, IQ = 20A, ISD <1A, ThinSOT Package VIN: 3V to 25V, VOUT(MAX) = 34V, IQ = 0.9mA, ISD <6A, TSSOP-16E Package 85% Efficiency, VIN: 1.5V to 5.5V, VOUT(MAX) = 10V, IQ = 10A, ISD <1A, ThinSOT Package VIN: 2.3V to 10V, VOUT(MAX) = 34V, IQ = 25A, ISD <1A, ThinSOT Package
No RSENSE is a registered trademark of Linear Technology Corporation.
3428f
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
LT/TP 0804 1K * PRINTED IN USA
FAX: (408) 434-0507 www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 2004

▲Up To Search▲

Price & Availability of LTC3428EDD

	To Download LTC3428EDD Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .