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Global Mixed-mode Technology Inc.
G940/G941
3.7V 400mA Low Dropout Regulator
Features
Dropout voltage typically 0.8V @ IO = 400mA Output current in excess of 400mA Output voltage accuracy +3%/-2% Quiescent current, typically 600A Internal short circuit current limit Internal over temperature protection
General Description
The G940/G941 positive 3.7V voltage regulator features the ability to source 400mA of output current with a dropout voltage of typically 0.8V over the entire operating temperature range. A low quiescent current is provided over the entire output current range. The typical quiescent current is 0.6mA. Furthermore, the quiescent current is smaller when the regulator is in the dropout mode (VIN < 3.7V). Familiar regulator features such as over temperature and over current protection circuits are provided to prevent it from being damaged by abnormal operating conditions.
Ordering Information
ORDER NUMBER
G940T21U G941T24U G940T73U
PACKAGE TYPE
SOT 89 SOT 89 SOT 23
1
VOUT GND GND
PIN OPTION 2
GND VIN VOUT
3
VIN VOUT VIN
*For other package types, pin options and package, please contact us at sales @gmt.com.tw
Order Number Identification
GXXX XX X X Packing Type Pin Option Package Type Part Number PACKAGE TYPE
T2 : SOT 89 T6 : SOT 223 T7 : SOT 23 T8 : TO92 1 1 : VOUT 2 : VOUT 3 : GND 4 : GND 5 : VIN 6 : VIN
PIN OPTION
2 GND VIN VOUT VIN GND VOUT 3 VIN GND VIN VOUT VOUT GND
PACKING
U & D : Tape & Reel D Direction T : Tube B : Bag
Typical Application
[Note 4] : Type of COUT
Package Type
3 IO
VIN
G940
C1 0.47F IQ
VOUT COUT 10F
Top View Top View
Top View Top View
Top View
1 2
1
2
3
1
2
3
SOT 89223
TO 92
SOT 23
Ver: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1) Absolute Maximum Ratings Input Voltage...................................................10V Power Dissipation Internally Limited ..(Note 2) Maximum Junction Temperature.......................150C Storage Temperature Range...............-65C TJ +150C Lead Temperature, Time for Wave Soldering SOT 89, SOT23 Package............................260C, 4s Continuous Power Dissipation (TA = + 25C) SOT 23(1).......................................................0.3W SOT 89(1).....................................................0.42W
Note (1): See Recommended Minimum Footprint.
(Note 1) Operating Conditions Input Voltage...............................................4V~7V Temperature Range.........................0C TJ 125C
G940/G941
Electrical Characteristics
VIN =5V, IO = 400mA, CIN = 1 F, COUT =10 F, All specifications apply for TA = TJ = 25C. [Note 3] PARAMETER
Output Voltage Accuracy Line Regulation Load Regulation Output Impedance Quiescent Current Ripple Rejection Dropout Voltage Short Circuit Current Over Temperature
CONDITIONS
IO = 10mA VIN = 4V to 7V, IO = 50mA IO = 10mA to 400mA 100mA DC and 100mA AC, fo = 120Hz VIN=5V fi = 120 Hz, 1VP-P, Io = 100mA IO = 400mA IO = 100mA
MIN
-2 -
TYP
0.08 100 0.6 42 0.8 130 0.76 125
MAX
+3 0.9 2.2 0.9 150 -
UNITS
% %/V % m mA dB V mV A
C
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 130C and IC will go into thermal shutdown. For the G940/G941 in SOT 23 package, JA is 350C/W and in the SOT 89 package is 250C/W (See Recommend Minimum Footprint). The safe operation in SOT 23 & SOT 89 package, it can see "Typical Performance Characteristics" (Safe Operating Area). Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Note4: The type of output capacitor should be tantalum or aluminum.
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 100mV 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.
Ver: 5.5 May 13, 2002
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.
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN=5V, CIN=1F, COUT=10F, TA=25C, unless otherwise noted.)
G940/G941
Load Transient
Line Transient
Ch1: Vout (offset=3.70V) Ch2: Vin (offset=5.0V) Iout=100mA
Ch1: Iout (400mA/div) Ch2: Vout (offset=3.70V)
Output Voltage Accuracy vs. Load Current
2.000%
Dropout Voltage vs. Load Current
900 800
Output Voltage Accuracy
Dropout Voltage (mV)
1.500%
700 600 500 400 300 200 100
1.000%
0.500%
0.000%
-0.500%
-1.000% 0 50 100 150 200 250 300 350 400 450 500 550 600
0 0 50 100 150 200 250 300 350 400 450
Load Current (mA)
Load Current (mA)
Ground Current vs. Load Current
2.0 1.8 1.6
Ground Current (mA)
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 50 100
Load Current (mA)
150
200
250
300
350
400
Ver: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
G940/G941
Maximum Power Dissipation of SOT 23
Safe Operating Area [Power Dissipation Limit]
500 450 400 350 300 250 200 150 100 50 0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 1oz Copper on SOT 23 Package Mounted on recommended mimimum footprint (RJA=350C/W) TA=25 TA=55 TA=85
0.5
Maximum Recommended Output Current TA=25C,Still Air
0.4
Power Dissipation (W)
Output Current (mA)
0.3
0.2
0.1
Still Air 1oz Copper on SOT 23 Package Mounted on recommend mimimum footprint (RJA=350C/W)
0.0
25 35 45 55 65 75 85 95 105 115 125
Input-Output Voltage Differential V IN-V OUT (V) Note: VIN(max) <= 6.5V
Amibent Temperature TA (C)
Safe Operating Area [Power Dissipation Limit]
500 450 400
Maximum Recommended Output Current TA=25C,Still Air
Maximum Power Dissipation of SOT 89
0.6 0.5
Output Current (mA)
350 300 250 200 150 100 50 0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 1oz Copper on SOT 89 Package Mounted on recommended mimimum footprint (RJA=250C/W) TA=25 TA=55 TA=85
Power Dissipation (W)
0.4 0.3 0.2 0.1 0
25 35 45 55 65 75 85 95 105 115 125 Still Air 1oz Copper on SOT 89 Package Mounted on recommend mimimum footprint (RJA=250C/W)
Input-Output Voltage Differential V IN-V OUT (V) Note: VIN(max) <= 6.5V
Amibent Temperature TA (C)
Recommend Minimum Footprint
Ver: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Package Information
D D1
G940/G941
POLISH
E
HE
A1 e C
MATTE FINISH
A
b
b1
b
POLISH
SOT-89 (T2) Package SYMBOLS
A A1 b b1 C D D1 HE E e
DIMENSIONS IN MILLIMETERS MIN NOM MAX
1.40 0.80 0.36 0.41 038 4.40 1.40 ----2.40 2.90 1.50 1.04 0.42 0.47 0.40 4.50 1.60 ----2.50 3.00 1.60 ----0.48 0.53 0.43 4.60 1.75 4.25 2.60 3.10
MIN
0.055 0.031 0.014 0.016 0.014 0.173 0.055 ----0.094 0.114
DIMENSIONS IN INCHES NOM MAX
0.059 0.041 0.016 0.018 0.015 0.177 0.062 ----0.098 0.118 0.063 ----0.048 0.020 0.017 0.181 0.069 0.167 0.102 0.122
Ver: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
G940/G941
A C
D B1
13(4X)
H
E
L e e1 L2
13(4X)
A1 B
SOT-223 (T6) Package SYMBOLS
A A1 B B1 C D E e e1 H L L2 0
MILLIMETERS MIN
1.55 0.02 0.60 2.90 0.24 6.30 3.30 2.30 BSC 4.60 BSC 6.70 0.90 MIN 0.06 BSC 10 0 7.30 0.264
INCHES MAX
1.80 0.12 0.80 3.10 0.32 6.70 3.70
MIN
0.061 0.0008 0.024 0.114 0.009 0.248 0.130 0.090 BSC 0.181 BSC
MAX
0.071 0.0047 0.031 0.122 0.013 0.264 0.146
0.287 0.036 MIN 0.0024 BSC 10
Ver: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
6
Global Mixed-mode Technology Inc.
G940/G941
C L
D
E
H
e
1
A A2 A1 b
SOT-23 (T7) Package
Note:
1.Package body sizes exclude mold flash protrusions or gate burrs
2.Tolerance 0.1000 mm (4mil) unless otherwise specified 3.Coplanarity: 0.1000mm 4.Dimension L is measured in gage plane
SYMBOLS
A A1 A2 b C D E e H L 1
MIN
1.00 0.00 0.70 0.35 0.10 2.70 1.40 ----2.60 0.37 1
DIMENSIONS IN MILLIMETERS NOM
1.10 ----0.80 0.40 0.15 2.90 1.60 1.90(TYP) 2.80 -----5
MAX
1.30 0.10 0.90 0.50 0.25 3.10 1.80 ----3.00 ----9
Ver: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
G940/G941
A
L
E
e G H D
b A1
R
2. 00
1(2 X) C 2 (2 X)
TO-92 (T8) Package
SYMBOLS
A A1 b C D E e F G H L 1 2
DIMENSIONS IN MILLIMETERS MIN NOM MAX
2.40 0.70 0.35 ----2.80 3.80 ----1.91 3.35 0.00 13.80 --------2.50 0.80 0.45 0.40 3.00 4.00 1.27 2.11 3.55 ----14.00 2 5 2.60 0.90 0.55 ----3.20 4.20 ----2.31 3.75 0.15 14.20 ---------
DIMENSIONS IN INCHES MIN
0.094 0.028 0.014 ----0.110 0.149 ----0.075 0.132 0.000 0.543 ---------
NOM
0.098 0.032 0.018 0.016 0.118 0.157 0.050 0.083 0.140 ----0.551 2 5
MAX
0.102 0.036 0.022 ----0.126 0.165 ----0.091 0.148 0.006 0.559 ---------
Package Orientation
Feed Direction SOT 89223 Package Orientation
Feed Direction SOT 23 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: 5.5 May 13, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
8

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