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Global Mixed-mode Technology Inc.
G905
2.5V 600mA Low Dropout Regulator
Features
Dropout voltage typically 0.8V @ IO = 600mA Output current in 600mA Output voltage accuracy +2% Quiescent current, typically 0.3mA Internal short circuit current limit Internal over temperature protection
General Description
The G905 positive 2.5V voltage regulator features the ability to source 600mA of output current with a dropout voltage of typically 0.8V. 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.
Application
CD-R/W DVD-ROM DVD player LAN Switch Broadband access
Ordering Information
ORDER NUMBER
G905T24U
ORDER NUMBER (Pb free)
G905T24UF
TEMP. RANGE
-40C to 85C
PACKAGE
SOT-89
1
GND
PIN OPTION 2
VIN
3
VOUT
Order Number Identification
GXXX XX X X Packing Type Pin Option Package Type Part Number PACKAGE TYPE
T2 : SO-T89 1 4 : GND
PIN OPTION
2 VIN 3 VOUT
PACKING
U & D : Tape & Reel Direction
Package Type
Typical Application
[Note 4] : Type of COUT
IO VIN
G905
C1 1F IQ
VOUT COUT 10F
Top View
1
2
3
SOT-89
Ver: 1.4 Apr 11, 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-89..................................................173C/W Thermal Resistance Junction to Case, (Jc) SOT-89....................................................25C/W
Note (1): See Recommended Minimum Footprint
G905
Operating Conditions
(Note 1) Input Voltage..........................................3.3V ~ 6V Temperature Range.......................-40C TA 85C
Electrical Characteristics
VIN =5V, IO = 600mA, CIN=1F, 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
CONDITION
10mA < IO < 600mA 4V < VIN < 6V, IO = 10mA 10mA < IO < 600mA VIN = 5V fi = 120Hz, Vripple=2VP-P, Io = 100mA IO = 600mA IO = 300mA Continuous Test, VIN = 3.3V TA = 25C, TJ < 125C, VOUT within 2% (Note 3) Minimum footprint
MIN
2.45 ---------------------
TYP
2.5 15 10 0.3 47 800 400 600 0.65 0.8 145
MAX
2.55 ---------------------
UNIT
V mV mV mA dB mV 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. For the G905 in SOT-89 (T2) package, JA is 173C/W (See recommend minimum footprint). The safe operation in 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: 1.4 Apr 11, 2005
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.)
G905
Load Transient
Line Transient
Short Circuit Current
Start-UP
Overcurrent Protection Characteristics
70 60 Ripple Rejection (dB) 50 40 30 20 10 0 10 100 V IN=5.0V COUT =10F
Ripple Rejection
IL=100mA
IL=600mA
1000 10000 Frequency (Hz)
100000 1000000
Ver: 1.4 Apr 11, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G905
Dropout Voltage vs.IL
Quiescent Current vs. Temperature
900 800 Quiescent Current (A) Dropout Voltage (mV) 700 600 500 400 300 200 100 0 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C) V IN=4V V IN=5V 1000 900 800 700 600 500 400 300 200 100 0 100
TA=85C TA=25C TA=-25C
200
300
400 IL (mA)
500
600
Output Voltage vs. Temperature
2.60 2.58 Output Voltage (V) 2.55 2.53 2.50 2.48 2.45 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C) V IN=4V V IN=5V V IN=6V IL=10mA Output Voltage (V) 2.6
Output Voltage vs. VIN IL=10mA
2.575 2.55 2.525 2.5 2.475 2.45 3 3.5 4 4.5 V IN (V) 5 5.5 6 TA=-25C TA=25C
TA=85C
SOT-89 Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air
2.5 Max. Dissipation Power (W) Max. Dissipation Power (W) 2.5
SOT-89 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area )
Unit:in2 A=0.5
2
2
A=1.0 A=1.5
1.5
1.5
A=2.0 A=2.5
1
1
A=3.0 A=3.5
0.5
0.5
A=4.0 A=4.5 A=5.0
0 0.5 1.5 2.5 3.5 PCB Top Copper Area (in2) 4.5
0 25 45 TAMB (C) 65 85
Ver: 1.4 Apr 11, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Recommended Minimum Footprint
SOT-89
G905
Ver: 1.4 Apr 11, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Package Information
G905
D D1 POLISH
E
HE
A1 e C
MATTE FINISH
A
b
b1
b
POLISH
SOT-89 (T2) Package
SYMBOL
A A1 b b1 C D D1 HE E e
DIMENSIONS IN MILLIMETER 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 INCH NOM
0.059 0.041 0.016 0.018 0.015 0.177 0.062 ----0.098 0.118
MAX
0.063 ----0.019 0.020 0.017 0.181 0.069 0.167 0.102 0.122
Taping Specification
PACKAGE
SOT-89
Q'TY/REEL
1,000 ea
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: 1.4 Apr 11, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
6

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