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Global Mixed-mode Technology Inc.
G9966
3A Low Dropout Regulator with Enable
Features
1.5V, 1.8V, 2.5V, 3.3V and Adjustable Outputs Over Current and Over Temperature Protection Output Current 3A Enable Pin 20A Quiescent Current in Shutdown TO-263-5 Package
General Description
The G9966 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 3 Amps. Since it has superior dropout characteristics compared with regular LDOs, it can be used to supply 2.5V on motherboards or 1.5V, 1.8V, 3.3V on peripheral cards from the power supply thus allowing the elimination of costly heatsinks. An enable pin further reduces power dissipation while shut down. The G9966 provides excellent regulation over variations in line, load and temperature. It provides over current and over temperature protection functions. The G9966 is available with 1.5V, 1.8V, 2.5V, 3.3V and adjustable outputs in TO-263-5 package.
Applications
Battery Powered Systems Motherboards Peripheral Cards Network Cards Set Top Boxes Notebook Computers
Ordering Information
ORDER NUMBER
G9966-15TGU G9966-18TGU G9966-25TGU G9966-33TGU G9966-ADJTGU
MARKING
G9966-15 G9966-18 G9966-25 G9966-33 G9966
TEMP. RANGE
-40C ~ +85C -40C ~ +85C -40C ~ +85C -40C ~ +85C -40C ~ +85C
PACKAGE (Pb free)
TO-263-5 TO-263-5 TO-263-5 TO-263-5 TO-263-5
Pin Configuration
G9966-XX
Typical Application Circuit
G9966-XX
VEN VIN VO VEN VIN VO GND
C1 220F 1 2 3 4 5
C2 220F
VEN VIN GND VO N.C.
TO-263-5 G9966-ADJ
VEN VIN VO R1 C1 220F 1 2 3 4 5 C2 220F R2
G9966-ADJ
VEN VIN VO ADJ GND
VEN VIN GND VO ADJ
TO-263-5
VO = 1.2 (R1+R2) Volts R2 R2=12k is recommended
Ver: 0.6 Preliminary May 19, 2006
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, 10sec) . . . . . .260C Thermal Resistance Junction to Ambient, (JA) TO-263-5(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 70C/W Thermal Resistance Junction to Case, (Jc) TO-263-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..5C/W ESD Rating (Human Body Model) . . . . . . . . .. . . .2kV
Note (1): See Recommended Minimum Footprint
G9966
Absolute Maximum Ratings
Operation Conditions (Note 1) Input Voltage . . . . . . . . . . . . . . . . . . . . . . . .2.2V ~5.5V Temperature Range . .. . . . . . . . . . .-40C TA +85C
Electrical Characteristics
VEN = VIN, VIN = 5V, IO = 0.5A, CIN = COUT = 220F, TA = TJ = 25C unless otherwise specified (Note 3) PARAMETER
Supply Voltage Output Voltage Line Regulation
SYMBOL
VIN VO
CONDITION
VIN = VO +0.7V, IO = 10mA VO+0.7V < VIN < 5.5V, IO = 10mA G9966-15 VIN = 2.5V, 10mA < IOUT < 3A G9966-18 VIN = 3.8V, 10mA < IOUT < 3A G9966-25 VIN = 5V, 10mA < IOUT < 3A G9966-33 VIN = 5V, 10mA < IOUT < 3A
MIN
2.2 -2 ---
TYP
--VO 0.3
MAX
5.5 2 2
UNIT
V % %
Load Regulation
---
1
2
%
Quiescent Current Ripple Rejection
IQ
VIN = 5V fi = 120Hz, 1VP-P, IO = 100mA G9966-15 VOUT = 2%, IOUT = 3A
----------------1.6 ------1.176 ---
3 55 0.85 0.8 0.6 0.55 1 150 ------20 1.2 0.2
10 --1 0.95 0.8 0.7 ------0.4 20 35 1.224 ---
mA dB
Dropout Voltage
VD
G9966-18 VOUT = 2%, IOUT = 3A G9966-25 VOUT = 2%, IOUT = 3A G9966-33 VOUT = 2%, IOUT = 3A
V
Short Circuit Current Over Temperature VEN Voltage High VEN Voltage Low VEN Bias Current Low Shutdown Current ADJ Reference Voltage ADJ Pin Threshold VENH VENL IENL VREF Output Active Output Disabled VEN = 0.4V VIN = 5V, VEN = 0V VIN=2.2V, VADJ=VOUT, IO=10mA
A C V V A A V V
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.
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
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.
G9966
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.
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
ViN-VOUT =3V, CIN = 220F, COUT =220F, TA = 25C, unless otherwise noted.
Line Transient Response
G9966
Load Transient Response
Short Circuit Current
70 60 Ripple Rejection (dB)
Ripple Rejection
IL=1A 50 40 30 20 10 0 10 IL=2A IL=3A
100
1000
10000
100000 1000000
Frequency (Hz)
G9966-33 Overcurrent Protection Characteristics
G9966-33 Start-up
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G9966-33 Start-up
G9966
G9966-18 Overcurrent Protection Characteristics
G9966-18-Start-up
G9966-18-Start-up
G9966 Max. Power Dissipation vs. PCB Top Copper Area
4.5 Max. Dissipation Power (W)
G9966 Max. Power Dissipation vs. TAMB
4.5 Max. Dissipation Power (W) 4 3.5 3
A=2.0
Unit:in2
A=0.5 A=1.0 A=1.5
4 3.5 3 2.5 2 1.5 1 0.5 0 0.5 1.5 2.5 3.5 4.5 PCB Top Copper Area (in2)
2.5 2 1.5 1 0.5
A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0
0 25 35 45 55 65 TAMB (C) 75 85
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G9966-18 Quiescent Current vs. Temperature
3.0
IL=10mA Quiescent Current (mA) Dropout Voltage (V) 2.0 1.8
G9966
G9966-18 Dropout Voltage vs. IL
2.5
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 TA=-25C 1 1.5 TA=25C TA=85C
2.0
1.5
VIN=4V VIN=5V
1.0 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C)
0.0 2 IL (A) 2.5 3
G9966-18 Output Voltage vs. Temperature
1.825 IL=10mA Output Voltage (V) 1.824 1.814 1.804 1.794
G9966-18 Output Voltage vs. IL
1.820 Output Voltage (V)
1.815
1.810 IL=4A 1.805
VIN=4V 1.784 1.774 1.764
IL=5A
VIN=5V
TA=25C
1.800 5 15 25 35 45 55 Temperature (C) 65 75 85
0
0.5
1
1.5
2
2.5
3
IL (A)
G9966-33 Quiescent Current vs. Temperature
4.0 1400 1200 Quiescent Current (mA) 3.5 Dropout Voltage (mV) 1000 800 600 400
G9966-33 Dropout Voltage vs.IL
3.0
VIN=6V
2.5
VIN=5V 200 TA=-25C TA=25C 1.5 2.0
TA=85C
2.0 -25 -15 -5 5 15 25 35 45 55 65 75 85
0 1.0
2.5
3.0
Temperature (C)
IL (A)
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
6
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G9966-33 Output Voltage vs. Temperature
3.334 3.334 TA=25C 3.314 Output Voltage (V) Output Voltage (V) VIN=6V 3.294 3.314 VIN=6V 3.294
G9966
G9966-33 Output Voltage vs. IL
3.274
VIN=5V
3.274 VIN=5V 3.254
3.254
IL=200mA
3.234 -25 -5 15 35 55 75 Temperature (C)
3.234 0 1
IL (A)
2
3
G9966-25 Quiescent Current vs. Temperature
3.50 1800 1600 Quiescent Current (mA) 3.00 Dropout Voltage (mV) 1400 1200 1000 800 600 400 200 1.00 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C) 0 1
G9966-25 Dropout Voltage vs.IL
2.50
2.00 VIN=5V 1.50 VIN=6V
TA=85C TA=25C TA=-25C 1.5 2 IL (A) 2.5 3
G9966-25 Output Voltage vs. Temperature
2.55 2.59 2.57 Output Voltage (V) Output Voltage (V) 2.55 2.53 2.51 2.49 2.47 2.45 -25 -5 15 35 55 75 Temperature (C) IL=10mA VIN=4V VIN=5V 2.54 2.53 2.52 2.51 2.5 2.49 2.48 2.47 2.46 2.45 0
G9966-25 Output Voltage vs. IL
TA=25C
VIN=4V
VIN=5V
0.5
1
1.5 IL (A)
2
2.5
3
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
Recommended Minimum Footprint
TO-263-5
G9966
Ver: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
8
Global Mixed-mode Technology Inc.
Package Information
A E c2 L2
G9966
D L
L1
e
b
C
TO-263-5 Package
Note: 1. JEDEC Outline: N/A
SYMBOL
A b c C2 D E e L L1 L2
DIMENSION IN MM MIN MAX
4.064 0.686 0.381 TYP 1.143 8.636 9.652 1.702 BSC 14.605 2.286 ----15.875 2.794 2.921 1.397 9.652 10.287 4.826 0.940
DIMENSION IN INCH MIN MAX
0.160 0.027 0.015 TYP 0.045 0.340 0.380 0.067 BSC 0.575 0.090 ----0.625 0.110 0.115 0.055 0.380 0.405 0.190 0.037
Taping Specification
PACKAGE
TO-263-5
Q'TY/BY REEL
800 ea
Feed Direction TO-263-5 Package Orientation
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: 0.6 Preliminary May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
9

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