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Global Mixed-mode Technology Inc.
G962
2A Low Dropout Regulator with Enable
Features
Adjustable Output from 1.2V to 4.8V Using External Resistors 1.5V, 1.8V and 2.5V options by Setting ADJ Pin Below 0.2V Over current and over temperature protection 500mV dropout @2A Enable pin 10A quiescent current in shutdown Output recovery mode in OTP Connect ADJ to GND for fixed output mode TO-252-5 Package
General Description
The G962 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 2 Amps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards or 1.5V, 1.8V on peripheral cards from the 3.3V supply thus allowing the elimination of costly heatsinks. An enable pin further reduces power dissipation while shut down. The G962 provides excellent regulation over variations in line, load and temperature. The TO-252-5 is available with 1.5V, 1.8V and 2.5V internally preset outputs that are also adjustable using external resistors.
Applications
Battery powered systems Motherboards Peripheral cards Set Top Boxes Notebook Computers
Ordering Information
ORDER NUMBER
G962-15ADJTJU G962-18ADJTJU G962-25ADJTJU
ORDER NUMBER (Pb free)
G962-15ADJTJUf G962-18ADJTJUf G962-25ADJTJUF
MARKING
G962-15 G962-18 G962-25
TEMP. RANGE
-40C ~ +85C -40C ~ +85C -40C ~ +85C
PACKAGE
TO-252-5 TO-252-5 TO-252-5
Note: TJ:TO-252-5
U : Tape & Reel e.g. 18 denotes the 1.8V output voltage.
Pin Configuration
Typical Application Circuit
IENH
R3 VEN VIN VO
G962
VEN VIN VO GND
Top View
1 2 3 4 5 C1 47F C2 100F
R1
ADJ
EN VIN GND VO ADJ
R2
TO-252-5
VO =
Volts R2 R2=12k is recommended R3 should be connected for current IENH restriction as VEN > VIN+0.3V
1.2 (R1+R2)
Ver: 0.8 Preliminary Apr 01, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1) Input Voltage....................................................7V VEN Voltage..............................................VIN+0.3V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature.......................150C Storage Temperature Range.........-65C TJ +150C Reflow Temperature (Soldering, 10 sec)...........260C Thermal Resistance Junction to Ambient, (JA) TO-252-5................................................95C/W Thermal Resistance Junction to Case, (JC) TO-252-5.......................................................8C/W ESD Rating (Human Body Model)......................2kV
G962
Absolute Maximum Ratings
Operation Conditions (Note 1) Input Voltage..........................................2.2V ~7V Temperature Range.....................-40C TA +85C
Electrical Characteristics
VEN=VIN, VIN =5V, IO = 0.5A, CIN = 4.7F, COUT =10F, TA = TJ = 25C unless otherwise specified (Note 3) PARAMETER
Output Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection Dropout Voltage Short Circuit Current Over Temperature VEN Voltage High VEN Voltage Low VEN Bias Current Low ADJ Reference Voltage ADJ Pin Threshold
SYMBOL
VO
CONDITION
VIN=VO +0.7V, IO=10mA VO+0.7V < VIN < 5.5V, IO=10mA 10mA < IO < 2A VIN=3.3V,VEN=VIN VIN=3.3V,VEN=0V fi=120Hz, 1VP-P, IO=100mA IO=2A (Note 4) Output Active Output Disabled VEN=0.4V VIN=2.2V, VADJ=VOUT, IO=10mA
MIN
-2 ----------------1.6 ----1.176 ---
TYP
VO 0.2 0.8 1.7 16 55 0.7 0.8 150 ------1.2 0.2
MAX
2 2 2 2.5 35 --0.85 ------0.4 20 1.224 ---
UNIT
% % % mA A dB V A C V V A V V
IQ VD
VENH VENL IENL VREF
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics. Note2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal resistance, JA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is (Tjmax-TA) / JA. If this dissipation is exceeded, the die temperature will rise above 150C and IC will go into thermal shutdown. Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Note4: The over temperature point is guarantee by design.
Definitions
Dropout Voltage The input/output voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 2% below its nominal value, dropout voltage is affected by junction temperature, load current and minimum input supply requirements. Line Regulation The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Load Regulation The change in output voltage for a change in load current at constant chip temperature. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Maximum Power Dissipation The maximum total device dissipation for which the regulator will operate within specifications. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load. Output Capacitor for Stable Condition The G962 can be stable for X5R MLCC capacitor larger than 10F or POSCAP capacitor larger than 47F.
Ver: 0.8 Preliminary Apr 01, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Typical Characteristics
VEN=VIN, =5V, IO = 0.5A, CIN = 4.7F, COUT =10F, TA = TJ = 25C (VOUT=1.8V)
Line Transient Load Transient
G962
Short Circuit Current
Start-UP
Overcurrent Protection Characteristics
70 60 Ripple Rejection (dB) 50 40 30 20 10 0 10 100
Ripple Rejection
IL=1A
IL=2A
VIN=5V COUT=10F Vripple=224mV 1000 10000 100000 1000000 Frequency (Hz)
Ver: 0.8 Preliminary Apr 01, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Characteristics (continued)
Max. Power Dissipation vs. PCB Top Copper Area
4.0
Max. Dissipation Power (W)
G962
Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area )
4
Unit: in2
A=0.5 A=1.0
3.5 Max. Dissipation Power (W) 3.0 2.5 2.0 1.5 1.0 0.5 0.0
TAMB = 25C ; Still Air
3.5 3 2.5 2 1.5 1 0.5 0 25 35 45 55 65 TAMB (C) 75 85
A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 2 PCB Top Copper Area (in )
Quiescent Current vs. Temperature
2.00 1.95 Quiescent Current (mA) 1.85 1.80 1.75 1.70 1.65 1.60 1.55 1.50 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C) VIN=3.0V VIN=5.0V Dropout Voltage (mV) 1.90 900 800 700 600 500 400 300 200 100 0 0
Dropout Voltage vs. Temperature
T=85C
T=25C
T=-25C
0.5 1 IL (A) 1.5 2
Output Voltage vs. Temperature
1.864 IL=10mA Output Voltage (V) 1.844
Output Voltage vs. VIN
1.864 1.844 Output Voltage (V) 1.824 1.804
T=25C IL=10mA T=85C
1.824
VIN=5.0V
1.804
VIN=3.0V
T=-25C
1.784
1.784 1.764
-25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C)
1.764
2.5
3
3.5
4
4.5 5 VIN (V)
5.5
6
6.5
7
Ver: 0.8 Preliminary Apr 01, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Recommend Minimum Footprint
G962
TO-252-5
Ver: 0.8 Preliminary Apr 01, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Package Information
E E1 L2 A F
G962
D
H
A1 L1 e b C L
A2
TO-252-5 (TJ) Package SYMBOL
A A1 b C D E E1 e F L L1 L2 H
MILLIMETER MIN.
2.19 0.89 0.64 0.46 5.36 6.35 5.21 1.27BSC 0.46 1.40 2.20 1.52 9.40 0 0.58 1.78 2.80 2.03 10.40 4 0.018 0.055 0.087 0.060 0.370 0
INCH MAX.
2.38 1.27 0.89 0.58 5.61 6.73 5.46
MIN.
0.086 0.035 0.025 0.018 0.211 0.250 0.205 0.050BSC
MAX.
0.094 0.050 0.035 0.023 0.221 0.265 0.215 0.023 0.070 0.110 0.080 0.410 4
Taping Specification
PACKAGE
TO-252-5
Q'TY/REEL
2,500 ea
Feed Direction TO -252-5 Package O rientation
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
Ver: 0.8 Preliminary Apr 01, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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