Global Mixed-mode Technology G923 Service Manual

Global Mixed-mode Technology Inc.

300mA High PSRR LDO Regulators

Features

 Low, 90µA No-Load Supply Current
 Guaranteed 300mA Output Current
 Dropout Voltage is 200mV @ 150mA Load
 PSRR=65dB @ 120Hz
 Over-Temperature Protection and Short-Circuit

Protection

 Two Modes of Operation ----

Fixed Mode: 1.50V~5.00V
Adjustable Mode: from 1.25V to 5.50V

 Max. Supply Current in Shutdown Mode < 1µA
 Low Output Noise at 224µV
 Stable with low cost ceramic capacitors

Applications

 Notebook Computers
 Cellular Phones
 PDAs
 Digital still Camera and Video Recorders
 Hand-Held Devices
 Audio Codec

RMS

G923

General Description

The G923 is a low supply current, high PSRR, and low
dropout linear regulator that comes in a space saving
SOT-23-5 package. The supply current at no-load is
90µA. In the shutdown mode, the maximum supply
current is less than 1µA. Operating voltage range of
the G923 is from 2.50V to 5.50V. The over-current
protection limit is set at 550mA typical. An over- tem­perature protection circuit is built-in in the G923 to
prevent thermal overload. These power saving fea­tures make the G923 ideal for use in the bat­tery-powered applications such as notebook com­puters, cellular phones, and PDA’s.

The G923 has two modes of operation. When the SET
pin is connected to ground, its output is a pre-set value:

1.50V~5.00V. There is no external component needed
to decide the output voltage. When an output other
than the preset value is needed, two external resistors
should be used as a voltage divider. The output volt­age is then decided by the resistor ratio. The G923
comes in a space saving SOT-23-5 package.

Pin Configuration

1

1

SHDN

SHDN

2

2

GND

GND

IN

IN

3

3

G963

G963

SOT-23-5

SOT-23-5

G923

G923

OUTPUT

C

C

OUT

OUT

1µF

1µF

OUTPUT

OUTPUT
VOLTAGE

VOLTAGE

C

C

OUT

OUT

1µF

1µF

OUTPUT
VOLTAGE

VOLTAGE

IN OUT

IN OUT

G923

＋

＋

C

C

IN

IN

1µF

1µF

_

＋

＋

－

－

_

BATTERY

BATTERY

C

C
1µF

1µF

IN

IN

Fixed mode

Fixed mode

IN

IN

SHDN

SHDN

BATTERY

BATTERY

5

5

SET

SET

4

4

OUT

OUT

SHDN

SHDN

GND

GND

G923

G923

GND

GND

G923

OUT

OUT

SET

SET

SET

SET

R1

R1

R2

R2

Ver: 1.1

Jan 19, 2006

1

Adjustable mode

Adjustable mode

TEL: [phone]

http://www.gmt.com.tw

Global Mixed-mode Technology Inc.

Ordering Information

G923

ORDER

NUMBER

G923-330T1U

For other output voltage, please contact us at [e-mail]
Note:

T1: SOT-23-5

U: Tape & Reel

ORDER NUMBER

(Pb free)

G923-330T1Uf

MARKING VOLTAGE TEMP. RANGE PACKAGE

92AUx 3.30V -40°C~ +85°C SOT-23-5

Selector Guide

ORDER

NUMBER

G923-150T1U G923-150T1Uf 1.50 92AAx
G923-160T1U G923-160T1Uf 1.60 92ABx
G923-170T1U G923-170T1Uf 1.70 92ACx
G923-180T1U G923-180T1Uf 1.80 92ADx
G923-190T1U G923-190T1Uf 1.90 92AEx
G923-200T1U G923-200T1Uf 2.00 92AFx
G923-210T1U G923-210T1Uf 2.10 92AGx
G923-220T1U G923-220T1Uf 2.20 92AHx
G923-230T1U G923-230T1Uf 2.30 92AIx
G923-240T1U G923-240T1Uf 2.40 92AJx
G923-250T1U G923-250T1Uf 2.50 92AKx
G923-260T1U G923-260T1Uf 2.60 92ALx
G923-270T1U G923-270T1Uf 2.70 92AMx
G923-280T1U G923-280T1Uf 2.80 92ANx
G923-285T1U G923-285T1Uf 2.85 92AOx
G923-290T1U G923-290T1Uf 2.90 92APx
G923-300T1U G923-300T1Uf 3.00 92AQx
G923-310T1U G923-310T1Uf 3.10 92ARx
G923-315T1U G923-315T1Uf 3.15 92ASx
G923-320T1U G923-320T1Uf 3.20 92ATx
G923-330T1U G923-330T1Uf 3.30 92AUx
G923-340T1U G923-340T1Uf 3.40 92AVx
G923-350T1U G923-350T1Uf 3.50 92AWx
G923-360T1U G923-360T1Uf 3.60 92AXx
G923-370T1U G923-370T1Uf 3.70 92AYx
G923-380T1U G923-380T1Uf 3.80 92AZx
G923-390T1U G923-390T1Uf 3.90 92BAx
G923-400T1U G923-400T1Uf 4.00 92BBx
G923-410T1U G923-410T1Uf 4.10 92BCx
G923-420T1U G923-420T1Uf 4.20 92BDx
G923-430T1U G923-430T1Uf 4.30 92BEx
G923-440T1U G923-440T1Uf 4.40 92BFx
G923-450T1U G923-450T1Uf 4.50 92BGx
G923-460T1U G923-460T1Uf 4.60 92BHx
G923-470T1U G923-470T1Uf 4.70 92BIx
G923-475T1U G923-475T1Uf 4.75 92BJx
G923-480T1U G923-480T1Uf 4.80 92BKx
G923-490T1U G923-490T1Uf 4.90 92BLx
G923-500T1U G923-500T1Uf 5.00 92BMx

ORDER NUMBER

(Pb free)

OUTPUT

VOLTAGE (V)

MARKING

Ver: 1.1

Jan 19, 2006

2

TEL: [phone]

http://www.gmt.com.tw

Absolute Maximum Ratings

VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 7V

Output Short-Circuit Duration . . . . . . . . . . . . . .Infinite

SET to GND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V

SHDNto GND. . . . . . . . . . . . . . . . . . . . . .-0.3V to 7V

SHDNto IN. . . . . . . . . . . . . . . . . . . . . . . .-7V to 0.3V

OUT to GND. . . . . . . . . . . . . . . . -0.3V to (V

(1)

Note

: See Recommended Minimum Footprint (Figure 3)

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Global Mixed-mode Technology Inc.

Continuous Power Dissipation (T

SOT-23-5. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 520mW

Operating Temperature Range . . . . . . . -40

Junction Temperature. . . . . . . . . . . . . . . . . . . . .150

Thermal Resistance Junction to Ambient, (

SOT-23-5. . . . . . . . . . . . . . . . . . . . . . . . 240

+ 0.3V)

IN

Storage Temperature Range. . . . . . . .-65

Reflow Temperature (soldering, 10sec) . . . . . . 260

G923

= 25°C)

A

°C to 85°C

°C

θ

)

JA

°C/Watt

(1)

°C to 160°C

°C

Electrical Characteristics

(V

=+3.6V, V SHDN =VIN, TA =TJ =+25°C, unless otherwise noted.) (Note 1)

IN

PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT

Input Voltage (Note 2) VIN 2.5 --- 5.5 V
Output Voltage Accuracy V
Adjustable Output Voltage Range (Note 3) V
Maximum Output Current 300 --- --- mA
Current Limit (Note 4) I
Short Circuit Current Isc --- 280 --- mA
Ground Pin Current IQ

Dropout Voltage (Note 5) V

Line Regulation
Load Regulation

Ripple Rejection PSRR F=100Hz, 0.45V

SHUTDOWN

SHDN Input Threshold

SHDN

Input Bias Current

Shutdown Supply Current I
SET INPUT

SET Reference Voltage (Note 3) V

SET Input Leakage Current (Note 3) I

THERMAL PROTECTION

Thermal Shutdown Temperature T
Thermal Shutdown Hysteresis

Note 1: Limits is 100% production tested at TA= +25°C. Low duty pulse techniques are used during test to maintain junc-

tion temperature as close to ambient as possible.
Note 2: Guaranteed by line regulation test.
Note 3: Adjustable mode only.
Note 4: Not tested. For design purposes, the current limit should be considered 400mA minimum to 650mA maximum.
Note 5: The dropout voltage is defined as (V

every G923 part, see “Typical Performance Characteristics”.

Variation from specified V

OUT

V

OUT

400 550 --- mA

LIM

I

=150mA --- 200 ---

OUT

ΔV
ΔV

DROP

LNR

LDR

=300mA --- 400 ---

I

OUT

SET=GND, V

=10mA

I

OUT

I

= 10mA to 300mA --- 0.02 --- %/mA

OUT

IN=V(STD)

P-P

+0.1V,to 5.5V

, I

OUT

, I

OUT

=1mA -2 --- 2 %

OUT

--- 5.5 V

SET

--- 90 --- µA

--- 0.06 --- %/V

=10mA --- 65 --- dB

VIH Regulator enabled 1.5 --- --­V

Regulator shutdown --- --- 0.4

IL

SHDN VSHDN = V

I

V

QSHDN

SET

SET

SHDN

ΔT

SHDN

IN-VOUT

OUT

= 2.5V to 5.5V,

V

IN

I

= 1mA

OUT

V

= 1.3V TA = +25°C --- 5 30 nA

SET

--- 145 --- °C

--- 25 --- °C

) when V

= 0V

IN

T

= +25°C

A

T

= +25°C

A

TA = +25°C
T

= T

to T

A

MIN

is 100mV below the target value of V

OUT

MAX

--- 0.003 0.1 µA

--- 0.2 1 µA

1.225 1.25 1.275

--- 1.25 ---

OUT

. The performance of

mV

V

V

Ver: 1.1

Jan 19, 2006

3

TEL: [phone]

http://www.gmt.com.tw