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Global Mixed-mode Technology Inc.
3.3V 600mA Low Dropout Regulator
Features
Dropout voltage typically 0.65V @ IO = 600mA Output current in excess of 600mA Output voltage accuracy +2% Quiescent current, typically 0.3mA Internal short circuit current limit Internal over temperature protection
G903
General Description
The G903 positive 3.3V voltage regulator features the ability to source 600mA of output current with a dropout voltage of typically 0.65V. A low quiescent current is provided. The typical quiescent current is 0.3mA. 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
G903T63U G903T65U
ORDER NUMBER (Pb free)
G903T63Uf G903T65Uf
PACKAGE
SOT223 SOT223
1
GND VIN
PIN OPTION 2 3
VOUT GND 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
T6: SOT223 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
Package Type
Typical Application
[Note 4]: Type of COUT
IO
Top View Top View
VIN C1 1F
G903
IQ
VOUT COUT 10F
1
2
3
SOT-223
Ver: 1.4 Mar 03, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings (Note 1) Input Voltage....................................................7V Power Dissipation Internally Limited (Note2) Maximum Junction Temperature.....................150C Storage Temperature Range........-65C TJ +150C Reflow Temperature (soldering, 10sec)............260C Thermal Resistance Junction to Ambient, (JA) SOT-223................................................147C/W Thermal Resistance Junction to Case, (Jc) SOT-223.................................................27C/W
Note (1): See Recommended Minimum Footprint.
G903
Operating Conditions
(Note 1) Input Voltage...........................................4V ~ 6.5V Temperature Range.......................-40C TA 85C
Electrical Characteristics
VIN =5V, IO = 600mA, CIN=10F, COUT =10F. All specifications apply for TA = TJ = 25C.[Note 3] PARAMETER
Output Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection Dropout Voltage Output Current Short Circuit Current Current Limit Over Temperature 10mA < IO <600mA 4V < VIN < 6V, IO = 10mA 10mA < IO < 600mA 10mA < IO < 250mA VIN = 5V fi = 120 Hz, 1VP-P, Io = 100mA IO = 600mA IO = 250mA
CONDITION
MIN
3.234 ---------------------
TYP
3.3 15 20 10 0.3 47 0.65 0.25 600 0.65 0.8 145
MAX
3.366 ---------------------
UNIT
V mV mV mA dB V mA A 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 150C and IC will go into thermal shutdown. The JA of SOT223 package is 147C/W (See Recommended Minimum Footprint). 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: 1.4 Mar 03, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN=+5V , CIN=10F, COUT =10F, TA=25C , unless otherwise noted.)
G903
Load Transient
Line Transient
Ch1: Vout (offset=3.30V) Ch2: Vin (offset=5.0V) IOUT=100mA
Output Voltage vs. Load Current
3.34 3.33 Quiescent Current (A) Output Voltage (V) 3.32 3.31 3.3 3.29 3.28 3.27 0 100 200 300 400 Load Current (mA) 500 600 240 220 200 180 160 140 120 100 80 60 40 20 0
Quiescent Current vs. Temperature
VIN=6V
VIN=5V
-45
-25
-5
15 35 55 75 Temperature (C)
95
115
Ripple Rejection vs. Frequency
60 50 Ripple Rejection (dB) 40 30 20 10 0
10 100 1000 10000 100000 1000000
Dropout Volatge vs. Temperature
600 550 Dropout Voltage (mV) 500 450 400 350 300 250 200 -15 5 25 IL=300mA
100mA 300mA 600mA
Frequency (Hz)
45 65 Temperature
85
105
125
Ver: 1.4 Mar 03, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN=5V, CIN=10F, COUT =10F, TA=25C, unless otherwise noted.)
G903
SOT-223 Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air
2.5
SOT-223 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area )
2.5 Max. Dissipation Power (W) 2 1.5 1 0.5 0 25 45 TAMB (C) 65 85
Unit:in2 A=0.5
Max. Dissipation Power (W)
2 1.5 1 0.5 0 0.5 1.5 2.5 3.5 PCB Top Copper Area (in2) 4.5
A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0
Recommended Minimum Footprint
SOT-223
Ver: 1.4 Mar 03, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Package Information
A D B1 C
G903
13(4X)
H
E
L e e1 L2
13(4X)
A1 B
SOT223 (T6) Package SYMBOLS
A A1 B B1 C D E e e1 H L L2
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 0 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
Taping Specification
PACKAGE
SOT-223
Q'TY/REEL
2,500 ea
Feed Direction SOT-223 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: 1.4 Mar 03, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
5

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