Global Mixed-mode Technology Inc.
G962
2A Low Dropout Regulator with Enable
Features
Adjustable Output from 1.2V to 4.8V Using External Resistors 1.5V, 1.8V and 2.5V options by Setting ADJ Pin Below 0.2V Fixed 2.5V, 3.3V and 5V Output for TO-252 Over current and over temperature protection 500mV dropout @2A Enable pin 10µA quiescent current in shutdown Output recovery mode in OTP Connect ADJ to GND for fixed output mode TO-252 and TO-252-5 Package
General Description
The G962 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 2 Amps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards or 1.5V, 1.8V on peripheral cards from the 3.3V supply thus allowing the elimination of costly heatsinks. An enable pin further reduces power dissipation while shut down. The G962 provides excellent regulation over variations in line, load and temperature. The G962 is available with 1.5V, 1.8V, 2.5V, 3.3V and 5V internally preset outputs.
Applications
Battery powered systems Motherboards Peripheral cards Set Top Boxes Notebook Computers
Ordering Information
ORDER NUMBER
G962-25T45U G962-33T45U G962-50T45U G962-15ADJTJU G962-18ADJTJU G962-25ADJTJU
ORDER NUMBER (Pb free)
G962-25T45Uf G962-33T45Uf G962-50T45Uf G962-15ADJTJUf G962-18ADJTJUf G962-25ADJTJUf
MARKING
G962-25 G962-33 G962-50 G962-15 G962-18 G962-25
TEMP. RANGE
-40°C ~ +85°C -40°C ~ +85°C -40°C ~ +85°C -40°C ~ +85°C -40°C ~ +85°C -40°C ~ +85°C
PACKAGE
TO-252 TO-252 TO-252 TO-252-5 TO-252-5 TO-252-5
Note: T4: TO-252 TJ:TO-252-5 U : Tape & Reel e.g. 18 denotes the 1.8V output voltage.
Pin Configuration
G962-XXT45
Typical Application Circuit
R3 VEN VEN VIN IENH
G962
VEN VIN VO GND
Top View 1 2 3
VO R1 C1 4.7µF C2 10µF R2
ADJ
VIN
GND
VO
TO-252
Top View
1 2 3 4 5
VO =
VEN VIN GND VO ADJ
Volts R2 R2=12kΩ is recommended R3 should be connected for current IENH restriction as VEN > VIN+0.3V
1.2 (R1+R2)
TO-252-5
Ver: 1.0 Jan 08, 2007
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Absolute Maximum Ratings (Note 1) Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V VEN Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . VIN+0.3V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature. . . . . . . . . . . . .150°C Storage Temperature Range . . . . -65°C ≤TJ ≤ +150°C Reflow Temperature (Soldering, 10 sec) . . . . . .260°C Thermal Resistance Junction to Ambient, (θJA) TO-252, TO-252-5 . . . . . . . . . . . . . . . . . . . . .95°C/W Thermal Resistance Junction to Case, (θJC) TO-252, TO-252-5. . . . . . . . . . . . . . . . . . . . . . 8°C/W ESD Rating (Human Body Model) . . . . . . . . . . . . .2kV
Operation Conditions (Note 1) Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2V ~7V Temperature Range. . . . . . . . .. . . . . . -40°C ≤TA ≤ +85°C
G962
Electrical Characteristics
VEN=VIN, VIN =5V, IO = 0.5A, CIN = 4.7µF, COUT =10µF, TA = TJ = 25°C unless otherwise specified (Note 3) PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT
Output Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection VO VIN=VO +0.7V, IO=10mA VO+0.7V < VIN < 5.5V, IO=10mA 10mA < IO < 2A VO=3.3V,VEN=VIN VEN=0V fi=120Hz, 1VP-P, IO=100mA G962-15, IOUT = 2A G962-18, IOUT = 2A G962-25, IOUT = 2A G962-33, IOUT = 2A G962-50, IOUT = 2A, VIN=6V (Note 4) Output Active Output Disabled VEN=0.4V VIN=2.2V, VADJ=VOUT, IO=10mA -2 ------------------------1.6 ----1.176 --VO 0.2 0.8 3 16 55 0.9 0.7 0.6 0.5 0.45 0.8 150 ------1.2 0.2 2 2 2 3.5 35 --1.1 0.9 0.7 0.6 0.55 ------0.4 20 1.224 --% % % mA µA dB
IQ
Dropout Voltage
VD
V
Short Circuit Current Over Temperature VEN Voltage High VEN Voltage Low VEN Bias Current Low ADJ Reference Voltage ADJ Pin Threshold
VENH VENL IENL VREF
A °C V V µA 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, θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is (Tjmax-TA) / θJA. If this dissipation is exceeded, the die temperature will rise above 150°C 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. Note4: The over temperature point is guarantee by design.
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. Load Regulation The change in output voltage for a change in load
Ver: 1.0 Jan 08, 2007
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. Output Capacitor for Stable Condition The G962 can be stable for X5R MLCC capacitor larger than 10µF or POSCAP capacitor larger than 47µF.
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Characteristics
VEN=VIN, =5V, IO = 0.5A, CIN = 4.7µF, COUT =10µF, TA = TJ = 25°C
G962-18 Line Transient Response
G962
G962-25 Line Transient Response
G962-33 Line Transient Response
G962-50 Line Transient Response
G962-18 Load Transient Response
G962-25 Load Transient Response
Ver: 1.0 Jan 08, 2007
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Characteristics (continued)
G962-33 Load Transient Response
G962
G962-50 Load Transient Response
G962-18 Short Circuit Current
G962-25 Short Circuit Current
G962-33 Short Circuit Current
G962-50 Short Circuit Current
Ver: 1.0 Jan 08, 2007
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Characteristics (continued)
G962-18 Overcurrent Protection Characteristics
G962
G962-25 Overcurrent Protection Characteristics
G962-50 Overcurrent Protection Characteristics
G962-18 Start-UP
G962-25 Start-UP
G962-50 Start-UP
Ver: 1.0 Jan 08, 2007
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Characteristics (continued)
G962-18 Ripple Rejection
70 60
Ripple Rejection (dB)
G962
G962-25 Ripple Rejection
IL=1A
70 IL=1A
Ripple Rejection (dB)
60 50 40 30 20 10 0 VIN=5V COUT=10µF Vripple=224mV
50 40 30 20 10 0
10 100 1000 10000 100000 1000000
IL=2A
IL=2A
VIN=5V COUT=10µF Vripple=224mV
10
100
1000
10000
100000
1000000
Frequency (Hz)
Frequency (Hz)
G962-33 Ripple Rejection
60 50
Ripple Rejection (dB)
G962-50 Ripple Rejection
60 50
Ripple Rejection (dB)
IL=100mA
IL=2A
40 30 20 10 0 -10 -20
(VIN-VOUT)>VDROPOUT VRIPPLE
