Global Mixed-mode Technology Inc.
G914X
150mA Low-Noise LDO Regulators
Features
Ultra Low Output Noise30µV (rms)
Ultra Low 55µA No-Load Supply Current
Ultra Low Dropout 70mV @ 50mA Load
Guarantee 150mA Output Current
Over-Temperature and Short-Circuit Protection
Fixed: 2.70V (G914A), 2.80V (G914B)
3.00V (G914C), 3.30V (G914D)
2.50V (G914E), 2.85V (G914F)
1.50V(G914G), 1.80V(G914H)
Max. Supply Current in Shutdown Mode < 1µA
Stable with low cost ceramic capacitors
General Description
The G914X is a low supply current, low dropout linear
regulator that comes in a space saving SOT23-5
package. The supply current at no-load is 55µA. In the
shutdown mode, the maximum supply current is less
than 1µA. Operating voltage range of the G914X is
from 2.5V to 5.5V. The over-current protection limit is
set at 350mA typical and 200mA minimum. An
over-temperature protection circuit is built-in in the
G914X to prevent thermal overload. These power
saving features make the G914X ideal for use in the
battery-powered applications such as notebook com-
puters, cellular phones, and PDA’s.
Applications
Notebook Computers
Cellular Phones
PDA
Hand-Held Devices
Battery-Powered Application
Ordering Information
PART MARKING VOLTAGE
G914A
G914B
G914C
G914D
G914E
G914F
G914G
G914H
4Axx
4Bxx
4Cxx
4Dxx
4Exx
4Fxx
4Gxx
4Hxx
2.70V
2.80V
3.00V
3.30V
2.50V
2.85V
1.50V
1.80V
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
-40°C~ +85°C
-40°C~ +85°C
PIN-
PACKAGE
SOT 23-5
SOT 23-5
SOT 23-5
SOT 23-5
SOT 23-5
SOT 23-5
SOT 23-5
SOT 23-5
Pin Configuration
Typical Operating Circuit
IN
1
5
OUT
IN
OUT
OUTPUT
VOLTAGE
GND
2
G914X
4
SOT23-5
BYP
＋
C
BATTERY
G914X
SHDN
BYP
GND
_
1µF
IN
C
OUT
1
µ
F
C
BYP
10nF
SHDN
3
Fixed mode
Ver: 1.1
Sep 18, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
V
IN
to GND……..………………..….….………-0.3V to +7V
Output Short-Circuit Duration.…..….……..…….….Infinite
All Other Pins to GND……….……….-0.3V to (V
IN
+ 0.3V)
Continuous Power Dissipation (T
A
= +25°C)
SOT23-5 …………………………..…………...…..520 mW
Note (1): See Recommended Minimum Footprint (Figure 2)
G914X
Operating Temperature Range….…..... -40°C to +85°C
Junction Temperature………………...…….……+150°C
(1)
θ
JA
…....……………….………………..…..240°C/Watt
Storage Temperature Range………….-65°C to +160°C
Lead Temperature (soldering, 10sec)….….……+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rat-
ings 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
=V
OUT(STD)
+1V, V
SHDN
=V
IN
, T
A
=T
J
=25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Input Voltage (Note 2)
Output Voltage Accuracy
Maximum Output Current
Current Limit (Note 3)
Ground Pin Current
V
IN
V
OUT
MIN TYP MAX UNITS
5.5
2
3
4
300
350
55
145
2
70
230
250
380
510
0.1
V
%
mA
mA
120
µA
mV
300
330
480
610
0.28
1
Note2
Variation from specified V
OUT
, I
OUT
=1mA,V
OUT
≥2.5V
version -2
For G914H, I
OUT
=1mA
-3
-4
For G914G, I
OUT
=1mA
I
LIM
I
Q
V
IN
=3.6V
I
LOAD
= 0mA
I
LOAD
= 50mA
I
OUT
= 1mA
I
OUT
= 50mA, V
OUT
≥
2.7V Version
V
O (NOM)
≥
3.0V
Dropout Voltage (Note 4)
V
DROP
2.5V≤V
O (NOM)
≤2.85V
I
OUT
= 150mA
V
O (NOM)
= 1.8V
V
O (NOM)
= 1.5V
Line Regulation
∆V
LNR
V
IN
=V
OUT
+100mV to 5.5V, I
OUT
= 1mA
Load Regulation (Note 5)
∆V
LDR
I
OUT
= 0mA to 150mA
Power Supply Rejection Ratio
PSRR I
OUT
= 30mA C
BYP
= 10nF, f = 120HZ
57
ΔV
O
/ΔT I
OUT
= 50mA, T
J
= 25°C to 125°C
Output Voltage Temperature Coefficient
30
C
OUT
= 1µF, I
OUT
= 150mA, C
BYP
=1nF
52
Output Voltage Noise
C
OUT
= 1µF, I
OUT
= 150mA, C
BYP
=10nF
35
V
IN
=V
OUT
+1V
(10Hz to 100kHz)
e
n
C
OUT
= 1µF, I
OUT
= 150mA, C
BYP
= 100nF
30
(G914H)
26
C
OUT
= 1µF, I
OUT
= 1mA, C
BYP
= 10nF
SHUTDOWN
V
IH
Regulator enabled
V
IN
- 0.7
SHDN
Input Threshold
V
IL
Regulator shutdown
V
SHDN
= V
IN
T
A
= +25°C
I
SHDN
0.003
SHDN
Input Bias Current
Shutdown Supply Current
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
I
Q SHDN
T
SHDN
∆T
SHDN
V
OUT
= 0V
T
A
= +25°C
150
15
mV
%/V
%
dB
ppm/°C
µV
RMS
0.4
0.1
1
V
µA
°C
°C
Note 1: Limits is 100% production tested at T
A
= +25°C. Low duty pulse techniques are used during test to
maintain junction temperature as close to ambient as possible.
Note 2: V
IN (min)
=V
OUT (STD)
+V
DROPOUT
Note 3: Not tested. For design purposes, the current limit should be considered 150mA minimum to 420mA maximum.
Note 4: The dropout voltage is defined as (V
IN
- V
OUT
) when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+1V.
The performance of every G914X version, see “Typical Performance Characteristics”.
Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested
for load regulation in the load range from 0mA to 150mA. Changes in output due to heating effects are cov-
ered by the thermal regulation specification.
Ver: 1.1
Sep 18, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
G914X
(V
IN
= V
O(STD)
+1V, V
SHDN
= V
IN
, C
IN
=1µF, C
OUT
=1µF, G914D, T
A
=25°C, unless otherwise noted.)
Output Voltage vs. Load Current
3.340
3.330
250
Ground Current vs. Load Current
3.310
3.300
3.290
3.280
3.270
3.260
3.250
3.240
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
Ground Current (µA)
3.320
200
Output Voltage (V)
150
100
50
0
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
Load Current (mA)
Load Current (mA)
Output Voltage vs. Input Voltage
3.50
3.00
Supply Current vs. Input Voltage
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
ILOAD=50mA
Output Voltage (V)
2.50
2.00
1.50
1.00
0.50
0.00
0
1
2
3
4
Supply Current (µA)
No Load
ILOAD=0A
5
6
5
6
7
Input Voltage (V)
Input Voltage (V)
Dropout Voltage vs. Loading by G914X
800
700
T
A
=25°C
Ouptut Noise 10HZ to 100KHZ
Dropout Voltage (mV)
600
500
400
300
200
100
0
0
10
20
30
40
50
G914G
G914H
G914E
G914A
G914B
G914F
G914C
G914D
60
70
80
90
100 110 120 130 140 150
Loading (mA)
Ver: 1.1
Sep 18, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(continued)
Line Transient
G914X
Load Transient
Load Transient
80
Power Supply Rejection Ripple
G914F
V
IN
=5V +2V(p-p)
RL=100Ω
CBYP=10nF
Power Supply Rejection Ratio(db)
70
60
50
40
30
20
10
0
0.1
1
10
100
Frequency(KHZ)
Output Noise vs. Bypass Capacitance
70
60
G914H
V
IN
=2.8V
T
A
=25°C
70
60
Output Noise vs. Load Current
G914H
V
IN
=2.8V
T
A
=25°C
Output Noise (µVrms)
Output Noise (µVrms)
50
40
30
20
10
0
0.001
0.01
0.1
50
40
30
20
10
0
1
10
100
1000
C
OUT
=1µF
C
OUT
=1µF
Bypass Capacitance (µF)
Load Current (mA)
Ver: 1.1
Sep 18, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(continued)
Turn On Response Time
G914X
Turn Off Response Time
Shutdown Pin Delay
Shutdown Response Time
Turn-On Time vs. Bypass Capacitance
100000
10000
Prop Delay
Turn-Off Time vs. Bypass Capacitance
1000
Prop Delay
100
Time (µs)
Time (µs)
1000
100
10
1
0.1
1
10
100
Bypass Capactor (nF)
Rise Time
G914D
I
LOAD
=150mA
C
IN
=C
OUT
=1µF
Fall Time
10
G914D
I
LOAD
=150mA
C
IN
=C
OUT
=1µF
1
0.1
1
10
100
Bypass Capacitor (nF)
Ver: 1.1
Sep 18, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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