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Global Mixed-mode Technology Inc.
G901
3.3V 300mA Low Dropout Regulator
Features
Dropout voltage typically 0.45V @ IO = 300mA Output current in excess of 300mA Output voltage accuracy +3% Quiescent current, typically 0.6mA Internal short circuit current limit Internal over temperature protection
General Description
The G901 positive 3.3V voltage regulator features the ability to source 300mA of output current with a dropout voltage of typically 0.45V. A low quiescent current is provided. The typical quiescent current is 0.6mA. Familiar regulator features such as over temperature and over current protection circuits are provided to prevent it from being damaged by abnormal operating conditions.
Applications
CD-ROM Modem LAN Hub Networking Appliances Mouse Keyboard
Ordering Information
ORDER NUMBER
G901T21U G901T24U
PACKAGE TYPE
SOT 89 SOT 89
1
VOUT GND
PIN OPTION 2
GND VIN
3
VIN VOUT
* 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 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 Direction T : Tube B : Bag
Typical Application
[Note 4]: Type of COUT
IO VIN CIN 1F
Package Type
G901
+ IQ
VOUT
Top View
COUT 10F 1 2 3
SOT 89
Ver: 1.0 Mar 22, 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 (Note2) Maximum Junction Temperature......................150C Storage Temperature Range.........-65C TJ +150C Lead Temperature, Time for Wave Soldering SOT89 Package.......................................260C, 4s Continuous Power Dissipation (TA = + 25C) SOT 89(1)......................................................0.5W
Note (1): See Recommended Minimum Footprint.
G901
Operating Conditions
(Note 1) Input Voltage.............................................4V ~ 7V Temperature Range.........................0C TJ 125C
Electrical Characteristics
VIN =5V, IO = 300mA, CIN=1F, COUT =10F. All specifications apply for TA = TJ = 25C.[Note 3] PARAMETER
Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Ripple Rejection Dropout Voltage Short Circuit Current Over Temperature
CONDITIONS
5mA < IO <300mA 4V < VIN < 6.5V, IO = 50mA 10mA < IO < 300mA 100mA DC and 100mA AC, fO = 120Hz VIN = 5V fi = 120 Hz, 1VP-P, Io = 100mA IO = 300mA IO = 50mA
MIN
3.201
TYP
3.3 3 28 102 0.6 42 450 50 0.77 150
MAX
3.399
UNITS
V mV mV m mA dB mV A C
100
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. For the G901 in SOT89 package, JA is 250C/W(See recommend minimum footprint). The safe operation in SOT 89, 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.
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: 1.0 Mar 22, 2002
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.)
Line Transient Load Transient
G901
Ch1: Vout (offset=3.30V) Ch2: Vin (offset=5.0V) Iout=100mA
Ch1: Iout (400mA/div) Ch2: Vout (offset=3.30V)
Output Voltage vs. Load Current
3.410 3.390 3.370 3.350 3.330 3.310 3.290 3.270 3.250
0 50 100 150 200 250 300
Dropout Voltage vs. Load Current
700 600
Dropout Voltage (mV)
Output Voltage (V)
500 400 300 200 100 0
0 50 100 150 200 250 300
Load Current (mA)
Load Current (mA)
Ground Current vs. Load Current
1.50 1.40 1.30
Ground Current (mA)
1.20 1.10 1.00 0.90 0.80 0.70 0.60 0 50 100 150 200 250 300
Load Current (mA)
Ver: 1.0 Mar 22, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
G901
Safe Operating Area of SOT-89
500
Maximum Power Dissipation of SOT-89
0.7
Output Current (mA)
Maximum Recommended Output Current
T A=25C,Still Air
Power Dissipation (W)
450 400 350 300 250 200 150 100 50 0
0.6 0.5 0.4 0.3 0.2 0.1 0
25 35 45 55 65 75 85 95 105 115 125
TA=25 TA=55 TA=85
1oz Copper on SOT-89 Package Mounted on recommended mimimum footprint (RJA =250/W ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
Input-Output Voltage Differential V IN-V OUT (V) Note: VIN(max) <= 6.5V
Amibent Temperature TA (C)
Recommend Minimum Footprint
Ver: 1.0 Mar 22, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Package Information
G901
D D1 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
Package Orientation
Feed Direction SOT 89 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: 1.0 Mar 22, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
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