Global Mixed-mode Technology Inc.
G923
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 238µV
RMS
Stable with low cost ceramic capacitors
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- tem-
perature protection circuit is built-in in the G923 to
prevent thermal overload. These power saving fea-
tures make the G923 ideal for use in the bat-
tery-powered applications such as notebook com-
puters, 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 volt-
age is then decided by the resistor ratio. The G923
comes in a space saving SOT-23-5 package.
Applications
Notebook Computers
Cellular Phones
PDAs
Digital still Camera and Video Recorders
Hand-Held Devices
Audio Codec
Pin Configuration
Typical Application Circuit
IN
OUT
OUTPUT
VOLTAGE
C
OUT
4.7µF
＋
C
BATTERY
SHDN
1
5
SET
G923
IN
_
1µF
SHDN
GND
SET
Fixed mode
GND
2
G923
G963
IN
3
4
OUT
＋
IN
OUT
R1
OUTPUT
VOLTAGE
SOT-23-5
－
BATTERY C
IN
1µF
G923
SHDN
GND
SET
R2
C
OUT
4.7µF
Adjustable mode
Ver: 1.6
Jul 24, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Ordering Information
ORDER
NUMBER
G923-330T1U
G923
TEMP. RANGE
-40°C~ +85°C
ORDER NUMBER
(Pb free)
G923-330T1Uf
MARKING
92AUx
VOLTAGE
3.30V
PACKAGE
SOT-23-5
For other output voltage, please contact us at sales
@
gmt.com.tw
Note:
T1: SOT-23-5
U: Tape & Reel
Selector Guide
ORDER
NUMBER
G923-150T1U
G923-160T1U
G923-170T1U
G923-180T1U
G923-190T1U
G923-200T1U
G923-210T1U
G923-220T1U
G923-230T1U
G923-240T1U
G923-250T1U
G923-260T1U
G923-270T1U
G923-280T1U
G923-285T1U
G923-290T1U
G923-300T1U
G923-310T1U
G923-315T1U
G923-320T1U
G923-330T1U
G923-340T1U
G923-350T1U
G923-360T1U
G923-370T1U
G923-380T1U
G923-390T1U
G923-400T1U
G923-410T1U
G923-420T1U
G923-430T1U
G923-440T1U
G923-450T1U
G923-460T1U
G923-470T1U
G923-475T1U
G923-480T1U
G923-490T1U
G923-500T1U
ORDER NUMBER
(Pb free)
G923-150T1Uf
G923-160T1Uf
G923-170T1Uf
G923-180T1Uf
G923-190T1Uf
G923-200T1Uf
G923-210T1Uf
G923-220T1Uf
G923-230T1Uf
G923-240T1Uf
G923-250T1Uf
G923-260T1Uf
G923-270T1Uf
G923-280T1Uf
G923-285T1Uf
G923-290T1Uf
G923-300T1Uf
G923-310T1Uf
G923-315T1Uf
G923-320T1Uf
G923-330T1Uf
G923-340T1Uf
G923-350T1Uf
G923-360T1Uf
G923-370T1Uf
G923-380T1Uf
G923-390T1Uf
G923-400T1Uf
G923-410T1Uf
G923-420T1Uf
G923-430T1Uf
G923-440T1Uf
G923-450T1Uf
G923-460T1Uf
G923-470T1Uf
G923-475T1Uf
G923-480T1Uf
G923-490T1Uf
G923-500T1Uf
OUTPUT
VOLTAGE (V)
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
2.85
2.90
3.00
3.10
3.15
3.20
3.30
3.40
3.50
3.60
3.70
3.80
3.90
4.00
4.10
4.20
4.30
4.40
4.50
4.60
4.70
4.75
4.80
4.90
5.00
MARKING
92AAx
92ABx
92ACx
92ADx
92AEx
92AFx
92AGx
92AHx
92AIx
92AJx
92AKx
92ALx
92AMx
92ANx
92AOx
92APx
92AQx
92ARx
92ASx
92ATx
92AUx
92AVx
92AWx
92AXx
92AYx
92AZx
92BAx
92BBx
92BCx
92BDx
92BEx
92BFx
92BGx
92BHx
92BIx
92BJx
92BKx
92BLx
92BMx
Ver: 1.6
Jul 24, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
V
IN
to GND. . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 7V
Output Short-Circuit Duration . . . . . . . . . . . . . .Infinite
SET to GND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
SHDN to GND. . . . . . . . . . . . . . . . . . . . . .-0.3V to 7V
G923
SHDN to IN. . . . . . . . . . . . . . . . . . . . . . . .-7V to 0.3V
OUT to GND. . . . . . . . . . . . . . . . -0.3V to (V
IN
+ 0.3V)
Note
(1)
: See Recommended Minimum Footprint (P.8 Figure 3)
Continuous Power Dissipation (T
A
= 25
°
C)
SOT-23-5. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 520mW
Operating Temperature Range . . . . . . . -40
°
C to 85
°
C
Junction Temperature. . . . . . . . . . . . . . . . . . . . .150
°
C
Thermal Resistance Junction to Ambient, (
θ
JA
)
SOT-23-5. . . . . . . . . . . . . . . . . . . . . . . . 240
°
C/Watt
(1)
Storage Temperature Range. . . . . . . .-65
°
C to 160
°
C
Reflow Temperature (soldering, 10sec) . . . . . . 260
°
C
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.
Electrical Characteristics
(V
IN
=+3.6V, V
SHDN
=V
IN
, T
A
=T
J
=+25°C, unless otherwise noted.) (Note 1)
PARAMETER
Input Voltage (Note 2)
Output Voltage Accuracy
Adjustable Output Voltage Range (Note 3)
Maximum Output Current
Current Limit (Note 4)
Short Circuit Current
Ground Pin Current
Dropout Voltage (Note 5)
Line Regulation
Load Regulation
Ripple Rejection
Output Noise
I
LIM
Isc
I
Q
I
OUT
=150mA
V
DROP
ΔV
LNR
ΔV
LDR
PSRR
Noise
I
OUT
=300mA, V
OUT
=2.7V
I
OUT
=300mA, V
OUT
>3.0V
SET=GND, V
IN
=V
(STD)
+0.1V to 5.5V , I
OUT
=10mA
I
OUT
= 10mA to 300mA
F=100Hz, 0.45V
P-P
, I
OUT
=10mA
F≤100kHz, Io=0A
F≤100kHz, Io=150mA
F≤100kHz, Io=300mA
SHUTDOWN
SHDN
Input Threshold
SHDN
Input Bias Current
SYMBOL
V
IN
V
OUT
V
OUT
CONDITION
Variation from specified V
OUT
, I
OUT
=1mA
MIN TYP MAX UNIT
2.5
-2
V
SET
300
400
---
---
---
---
---
---
---
---
---
---
---
1.5
---
---
---
---
---
550
280
90
200
500
400
0.1
65
136
238
253
---
---
0.003
0.2
5.5
2
5.5
---
---
---
120
---
700
500
%/V
%
dB
µV
(RMS)
1
---
---
---
---
---
0.4
0.1
1
V
%
V
mA
mA
mA
µA
mV
0.06 0.12
V
IH
V
IL
I
SHDN
I
QSHDN
V
SET
I
SET
T
SHDN
ΔT
SHDN
Regulator enabled
Regulator shutdown
V
SHDN
= V
IN
V
OUT
= 0V
V
IN
= 2.5V to 5.5V,
I
OUT
= 1mA
V
SET
= 1.3V
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
V
µA
µA
V
nA
°C
°C
---
---
Shutdown Supply Current
SET INPUT
SET Reference Voltage (Note 3)
SET Input Leakage Current (Note 3)
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
1.225 1.25 1.275
---
1.25 ---
---
---
---
5
145
25
30
---
---
Note 1: Limits is 100% production tested at T
A
= +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
IN
-V
OUT
) when V
OUT
is 100mV below the target value of V
OUT
. The performance of
every G923 part, see
“Typical
Performance Characteristics”.
Ver: 1.6
Jul 24, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
= 5V, V
OUT
= 3.3V, C
IN
= 1µF, C
OUT
= 1µF, T
A
=25°C, unless otherwise noted.)
G923
Load Transient
Line Transient
Short Circuit Current
Start-Up
Overcurrent Protection Characteristics
80
70
Ripple Rejection (dB)
Ripple Rejection
I
L
=100mA
60
50
40
30
20
10
0
10
100
1000
10000
Frequency (Hz)
100000
V
IN
=5V ; C
OUT
=1
µ
F
V
ripple(pk-pk)
=448mV
I
L
=10mA
Ver: 1.6
Jul 24, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(continued)
G923
Shuntdown Pin Delay
Shuntdown Pin Delay
Dropout vs I
O
500
Output Noise (I
O
=0A)
400
Drop out (mV)
300
200
100
0
0
50
100
150
Io (mA)
200
250
300
Output Noise (I
O
=150mA)
Output Noise (I
O
=300mA)
Ver: 1.6
Jul 24, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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