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AME, Inc.
AME5150
n General Description
The AME5150 is an inverting DC/DC converter operating from 1.5V to 5.5V input voltage range. It is capable of producing up to -28V of regulated negative output voltage. Built-in current-limit and fixed off-time control scheme of AME5150 provides high efficiency over a wide range of load conditions. Low supply current, 400ns fixed off-time, small package, and tiny external components makes AME5150 a extremely compact and high efficiency voltage biasing solution for battery-powered application. The AME5150 is available in a small SOT-25/TSOT-25 packages. Figure. 1 1-cell Li-lon to -15V inverting converter
C1 4.7F IN SW CF D1 15pF R2 267K C3 4.7F R1 24.9K
Micropower Inverting DC/DC Converter
n Typical Application
VIN
1.5V~5.5V
L1 10H
C2 0.47F
L2 10H
-15V
AME5150
EN NFB GND
n Features
l 1 Internal Switch l Use Small Surface Mount Components l Adjust Output Voltage up to -28V l 1.5V to 5.5V Input Voltage Range l Input under Voltage Lockout l 0.1 A Shutdown Current l Internal Soft Star l All AME's Lead Free Products Meet RoHS Standards
VIN
1.5V~5.5V
R1 =
VOUT - VNFB VNFB R2 + INFB
D4
+15V 5mA C5 1F
D3 C4 1F L1 10H C2 0.47F D2
-15V 5mA
n Applications
l Electronic Information Organizers l Palmtops l Cellular and Portable Phones l Portable Audio Systems l Various Multi-function Power Supplies
C1 4.7F
IN
SW
AME5150
EN NFB GND
CF D1 15pF
R2 267K C3 4.7F
R1 24.9K
Figure. 2 15V Dual output converter
Rev.A.01
1
AME, Inc.
AME5150
n Function Block Diagram
L1 VIN C1 EN IN C2 SW L2 VOUT C3 D1
Micropower Inverting DC/DC Converter
+ -
Enable Comp
Vref VOUT R1
(EXTERNAL)
+
CL Adjust
Current Limit 400ns one Shot Logic control UVLO Driver
VIN
Cs NFB
(EXTERNAL)
R2
GND
Figure. 3
2
Rev.A.01
AME, Inc.
AME5150
n Pin Configuration
SOT-25/TSOT-25 Top View
5 4
Micropower Inverting DC/DC Converter
AME5150AEEV 1. SW 2. GND
AME5150
3. NFB 4. EN 5. IN
1
2
3
Die Attach: Conductive Epoxy
n Pin Description
Pin Number
1
Pin Name
SW
Pin Description
Power Switch input. This is the drain of the internal NMOS power switch. Minimize the metal trace area connected to this pin to minimize EMI. Ground. Tie directly to ground plane. Output voltage feedback input. Set the output voltage by selecting values for R1 and R2 using:
2
GND
3
NFB
R1 =
VOUT - VNFB VNFB R2 + I NFB
4
EN
Enable control input, active high. The enable pin is an active high control. Tie this pin above 1.5V to enable the device. Tie this pin below 0.4V to turn off the device. Analog and Power input. Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible.
5
IN
Rev.A.01
3
AME, Inc.
AME5150
n Ordering Information AME5150 x x x x xxx x
Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration
Number of Pins V: 5
Micropower Inverting DC/DC Converter
Pin Configuration A
(SOT-25) (TSOT-25)
Operating Ambient Temperature Range E: -40OC to 85OC
Package Type E: SOT-2X
Output Voltage
Special Feature
1. SW 2. GND 3. NFB 4. EN 5. IN
ADJ: Adjustable
Z: Lead free Y: Lead free & Low profile
n Ordering Information
Part Number
AME5150AEEVADJZ AME5150AEEVADJY
Marking*
BISww BISww
Output Voltage
ADJ ADJ
Package
SOT-25 TSOT-25
Operating Ambient Temperature Range
-40OC to 85OC -40OC to 85OC
Note: ww represents the date code and pls refer to Date Code Rule on Package Dimension. * A line on top of the first letter represents lead free plating such as BISww. Please consult AME sales office or authorized Rep./Distributor for the availability of package type.
4
Rev.A.01
AME, Inc.
AME5150
n Absolute Maximum Ratings
Parameter
Input Supply Voltage EN, NFB Voltages SW Voltage N-Channel Switch Sink Current ESD Classification
Micropower Inverting DC/DC Converter
Symbol
VIN EN,VNFB VSW ISW
Maximum
6 VIN VOUT + 0.3 600 B*
Unit
V V V mA
Caution: Stress above the listed absolute rating may cause permanent damage to the device. * HBM B: 2000~3999V
n Recommented Operating Conditions
Parameter
Ambient Temperature Range Junction Temperature Range Storage Temperature Range
Symbol
TA TJ TSTG
Rating
- 40 to 85 - 40 to 125 - 65 to 150
Unit
O
C
n Thermal Information
Parameter
Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10Sec)** SOT-25 TSOT-25 Conductive Epoxy
Package
Die Attach
Symbol
JC JA
PD
Maximum
81
Unit
o
C/W
260
400 350
mW
o
C
* Measure JC on backside center of molding compund if IC has no tab. ** MIL-STD-202G 210F
Rev.A.01
5
AME, Inc.
AME5150
n Electrical Specifications
VIN = 3.6V, EN = VIN, TA = 25oC, CIN = 4.7F, IL = 0A, unless otherwise noted.
Parameter Input Voltage Quiescent Current Shutdown Current Feedback Trip Point Feedback Hysteresis Switch Current Limit NFB Pin Bias Current Switch RDSON Switch Off Time Input Undervoltage Lockout EN Input Threshold (High) (Enable the device) EN Input Threshold (Low) (Shutdown) Symbol VIN IQ ISD V NFB V NFB Hysteresis ICL INFB RDSON t OFF UVLO 1.5 EN Threshold 0.4 V VNFB = -1.23V 0.6 300 VIN = 2V, VNFB = -1.3V EN = 0V -1.205 Test Condition Min 1.5 65 0.1 -1.23 5 375 2 1 400 1.2 1.4 450 2.7 1.4 Typ Max 5.5 90 1 -1.255 Units V A A V mV mA A nS V
Micropower Inverting DC/DC Converter
6
Rev.A.01
AME, Inc.
AME5150
n Detailed Description
The AME5150 features a constant off-time control scheme. Operation can be best understood by referring to Figure 3. When the voltage at the NFB pin is larger than -1.23V, the Enable Comp in Figure 3 enables the device and the NMOS switch is turned on, pulling the SW pin to ground. When the NMOS switch is on, load current is supplied by the output capacitor C3. Once the current in the inductor reaches the peak current limit, the 400ns One Shot turns off the NMOS switch. During this time the energy stored in the inductor is transferred to C3 and the load. After the 400ns off-time the NMOS switch is turned on and energy is stored in the inductor again. This energy transfer from the inductor to the output causes a stepping effect in the output ripple. This cycle is continued until the voltage at NFB pin reaches -1.23V. When NFB pin reaches this voltage, the enable comparator then disables the device turning off the NMOS switch and reducing the quiescent current of the device to 65A. The load current is then supplied solely by C3 indicated by the gradually decreasing voltage at the output. When the NFB pin drops slightly below -1.23V, the enable comparator enables the device and begins the cycle as described previously. The EN pin can be used to turn off the AME5150 and reduce the quiescent current to 0.1A.
Micropower Inverting DC/DC Converter
Rev.A.01
7
AME, Inc.
AME5150
n Typical Application
VIN
1.5V~5.5V
Micropower Inverting DC/DC Converter
L1 10H
C2 0.47F
D2
-15V
IN
SW
AME5150
C1 4.7F EN NFB GND
CF D1 15pF
R2 267K C3 4.7F
R1 24.9K
Figure. 4 1-cell Li-lon to -15V inverting charge pump converter
8
Rev.A.01
AME, Inc.
AME5150
Efficiency vs. Loading
80 VIN = 4.2V VIN = 3.6V
650 700
Micropower Inverting DC/DC Converter
Switch off Time vs. Temperature
Switch Off Time (ns)
VOUT = -15V
75
600 550 500 450 400 350 300 -40
Efficiency (%)
VIN = 2.7V 70
65
60
55
1 2 3 4 5 6 7 8 9 101112 131415 16171819202122 232425 26
-20
0
20
40
60
80
100
Load Current (mA)
Temperature (oC)
INFB vs. Temperature
2.7 2.5
80 90
IQ vs. Temperature
2.3 2.1
70
INFB (A)
1.9 1.7 1.5 1.3
IQ (A)
60
50
40
1.1 0.9 -40
30 -40
-20
0
20
40
60
80
100
-20
0
20
40
60
80
100
Temperature (oC)
Temperature ( oC)
EN Threshold High vs. Temperature
1.5 1.4 1.3
1.5 1.4 1.3
EN Threshold Low vs. Temperature
EN Threshold (V)
EN Threshold (V)
1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 -40 -20 0 20 40 o 60 80 100
1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 -40 -20 0 20 40 60 80 100
Temperature ( C)
Temperature (oC)
Rev.A.01
9
AME, Inc.
AME5150
RDSON vs. Temperature
1.5 1.4 1.3 1.2
Micropower Inverting DC/DC Converter
VNFB vs. Temperature
1.25 1.24 1.23
RDSON ()
1.0 0.9 0.8
0.7 0.6 0.5 -40 -20 0 20 40 60 80 100
VNFB (V)
1.1
1.22 1.21 1.20 1.19 1.18 -40
Temperature (oC)
-20
0
20
40
60
80
100
Temperature (oC)
UVLO vs. Temperature
1.50
600
Switch Current Limit vs. Temperature
Switch Current Limit (mA)
550 500 450 400 350 300 250 200 -40
1.45 1.40 1.35
UVLO (V)
1.30 1.25 1.20 1.15 1.10 1.05 1.00 -40 -20 0 20 40 60 80 100
-20
0
20
40
60
80
100
Temperature (oC)
Temperature (oC)
10
Rev.A.01
AME, Inc.
AME5150
n Date Code Rule
Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9
Micropower Inverting DC/DC Converter
n Tape and Reel Dimension
SOT-25
P
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
Rev.A.01
11
AME, Inc.
AME5150
n Tape and Reel Dimension
TSOT-25
P
Micropower Inverting DC/DC Converter
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package TSOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
12
Rev.A.01
AME, Inc.
AME5150
n Package Dimension
SOT-25
Top View D
L
Micropower Inverting DC/DC Converter
Side View
SYMBOLS A A1
MILLIMETERS MIN
0.00 0.30 2.70 1.40
INCHES MIN
0.0000 0.0118 0.1063 0.0551
MAX
0.15 0.55 3.10 1.80
MAX
0.0059 0.0217 0.1220 0.0709
1.20REF
0.0472REF
E
b D E
S1 e c1
H
e H L 1
1.90 BSC 2.60 3.00
0.07480 BSC 0.10236 0.11811 0.0146BSC 0o 10 o
0.37BSC 0o 10 o
Front View
A
S1
0.95BSC
0.0374BSC
b
TSOT-25
Top View D
L
A1
Side View
SYMBOLS A+A1 b
MILLIMETERS MIN
0.90 0.30 2.70 1.40
INCHES MIN
0.0354 0.0118 0.1063 0.0551
MAX
1.25 0.50 3.10 1.80
MAX
0.0492 0.0197 0.1220 0.0709
E
D E e
S1 e c1
H
1.90 BSC 2.40 3.00
0.07480 BSC 0.09449 0.11811 0.0138BSC
o
H L 1
0.35BSC 0
o
10
0o
10 o
Front View
A
S1
0.95BSC
0.0374BSC
b
Rev.A.01
A1
13
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. (c) AME, Inc. , Auguest 2007 Document: 1231-DS5150-A.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989
U.S.A.(Subsidiary)
Analog Microelectronics, Inc.
3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2438 Tel : (408) 988-2388 Fax: (408) 988-2489

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