ETL GT2133-33 C m o s p o s i t i v e v o l t a g e r e g u l a t o r Datasheet

ISSUED DATE :2006/01/26
REVISED DATE :
GT2133
C M O S P o s i t i v e Vo l t a g e R eg u l a t o r
Description
The GT2133 series of positive, linear regulators feature low quiescent current (30 A typ.) with low dropout
voltage, making them ideal for battery applications.
The space-saving SOT-26 package is attractive for “Pocket” and “Hand Held” applications.
This rugged device has both Thermal Shutdown, and Current Fold-back to prevent device failure under the
“Worst” of operating conditions.
An additional feature is a “Power Good” detector, which pulls low when the output is out of regulation. In
applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and ground.
The GT2133 is stable with an output capacitance of 2.2 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 300mA output
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Typical Accurate± 1.5%
Noise Reduction Bypass Capacitor
Power-saving Shutdown Mode
Power Good Detector
Factory Pre-set Output Voltages
Low Temperature coefficient
Functional Block Diagram
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Cordless Phones
Electronic Scales
Package Dimensions
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
2.70
3.10
2.60
3.00
1.40
1.80
0.30
0.55
0
0.10
0°
10°
REF.
G
H
I
J
K
L
Dimensions
Millimeter
1.90 REF.
1.20 REF.
0.12 REF.
0.37 REF.
0.60 REF.
0.95 REF.
Typical Application Circuit
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ISSUED DATE :2006/01/26
REVISED DATE :
Absolute Maximum Ratings
Parameter
Input Max Voltage
Output Current
Input, Output Voltage
Operating Ambient Temperature
Junction Temperature
Maximum Junction Temperature
Thermal Resistance
Power Dissipation( T=100 )
EDS Classification
Output Voltage
Symbol
VOUT (E)
Output Current
Current Limit
Load Regulation
IO
ILIM
REGLOAD
Dropout Voltage
VDROPOUT
Quiescent Current
Ground Pin Current
Line Regulation
Input Voltage
Over Temperature Shutdown
Over Temperature Hysterisis
Vo Temperature Coefficient
Short Circuit Current(Note4)
Power Supply Rejection
Output Voltage Noise
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Output Voltage
Ratings
Unit
VIN
IOUT
8
PD/( VIN- VO)
GND-0.3 to VIN+0.3
-40 ~ +85
-40 ~ +125
150
260
380
B
V
mA
V
Topr
Tj
Tj Max
ja
PD
Electrical Characteristics Ta=25
Parameter
Symbol
(Note1)
IQ
IGND
REGLINE
VIN
OTS
OTH
TC
ISC
unless otherwise noted
Condition
Min
VIN=VOUT(T)+2V, IO=1mA
-1.5%
VIN=VOUT(T)+2V, VO>1.2
300
-
-
mA
VIN=VOUT(T)+2V, VO>1.2
VIN=VOUT(T)+2V, IO=1mA to 300mA
1.2V VOUT(T) 2.0V
IO=300mA
2.0V<VOUT(T) 2.8V
VO=VOUT(E)-2%
2.8V<VOUT(T)
VIN= VOUT(T)+1V, IO=0mA
300
-1
-
450
0.2
-
1
1300
mA
%
-
-
400
mV
-
30
300
50
A
VIN= VOUT(T)+2V, IO=1mA~300mA
1.2V VOUT(T) 1.4V
IO=1mA
VIN=VOUT(T)+1 to 1.4V<VOUT(T) 2.0V
VOUT(T)+2
2.0V<VOUT(T)<4
4.0V VOUT(T)
-0.2
-0.15
-0.1
-0.4
Note3
-
35
0.02
0.2
150
0.2
0.15
0.1
0.4
7
-
VIN=VOUT(T)+1V, VO<0.8V
-
30
30
150
300
PSRR
VIN=VOUT(T)+2V
Io=100mA
Co=2.2 F
eN
f=10Hz~100kHz
Io=10mA
VEH
VEL
IEH
IEL
ISD
VO,SD
Output Under Voltage
VUV
Output Over Voltage
VOV
PG Leakage Current
PG Voltage Rating
PG Voltage Low
ILC
VPG
VOL
/W
mW
TYP
VOUT(T)
(Note2)
Max
Unit
1.5%
V
A
%
V
ppm/
mA
f=1kHz
-
50
-
f=10kHz
f=100kHz
-
20
15
-
dB
Co=2.2 F
-
30
-
Vrms
2.0
0
0
115
125
-
0.5
-
VIN
0.4
0.1
0.5
1
0.4
85
75
1
7
0.4
V
V
A
A
A
V
VIN=2.7V to 7V
VIN=2.7V to 7V
VEN=VIN, VIN=2.7V to 7V
VEN= 0V, VIN=2.7V to 7V
VIN=5V, VO=0V, VEN<VEL
Io=0.4mA, VEN<VEL
2.5V VOUT(T) 5.0V
1.2V VOUT(T)<2.5V
2.5V VOUT(T) 5.0V
1.2V VOUT(T)<2.5V
VPG=7V
VO in regulation
ISINK=0.4mA
% VOUT(T)
% VOUT(T)
A
V
V
Note 1: V OUT (E) =Effective Output Voltage (i.e. the output voltage when “VOUT (T) + 2.0V” is provided at the VIN pin while maintaining a
certain IOUT value).
2: VOUT (T) =Specified Output Voltage
3: VIN (MIN) =VOUT+VDROPOUT
4: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be applied before
a current source load is applied.
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ISSUED DATE :2006/01/26
REVISED DATE :
Ordering Information ( contd. )
Part Number
GT2133-15
GT2133-25
GT2133-28
GT2133-30
GT2133-33
GT2133-35
GT2133-37
GT2133-2H
Marking
3C152
XXXX
3C252
XXXX
3C282
XXXX
3C302
XXXX
3C332
XXXX
3C352
XXXX
3C372
XXXX
3C2H2
XXXX
Output Voltage
Part Number
1.5V
GT2133-18
2.5V
GT2133-27
2.8V
GT2133-29
3.0V
GT2133-31
3.3V
GT2133-34
3.5V
3.7V
GT2133-36
GT2133-38
Marking
3C182
XXXX
3C272
XXXX
3C292
XXXX
3C312
XXXX
3C342
XXXX
3C362
XXXX
3C382
XXXX
Output Voltage
1.8V
2.7V
2.9V
3.1V
3.4V
3.6V
3.8V
2.85V
Detailed Description
The GT2133 family of COMS regulators contain a PMOS pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown and Power Good detection circuitry.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision
reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds
150 , or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
The GT2133 switches from voltage mode to current mode when the load exceeds the rated output current.
This prevents over-stress. The GT2133 also incorporates current fold-back to reduce power dissipation when
the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces
the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts.
External Capacitors
The GT2133 is stable with an output capacitance to ground of 2.2 F or greater. Ceramic capacitors have the
lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the
highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are
comparatively expensive. One option is to parallel a 0.1 F ceramic capacitor with a 10 F Aluminum Electrolytic.
The benefit is low ESR, high capacitance, and low overall cost.
A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should
be at least 0.1 F to have a beneficial effect.
A third capacitor can be connected between the BY-Pass pin and Gnd. This capacitor can be a low cost
Polyester Film variety between the value 0.001 ~ 0.01uF. A large capacitor improves the AC ripple rejection,
but also makes the output come up slowly. This “Soft” turn-on is desirable in some applications to limit turn-on
surges.
All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This
can be achieved with a “Star” connection.
Enable
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all
internal circuits are powered down. In this state, the quiescent current is less than 1 A. This pin behaves much
like an electronic switch.
Power Good
The GT2133 includes the Power Good feature. When the output is not within ±15% of the specified voltage, it
pulls low. This can occur under the following conditions:
1) Input Voltage too low.
2) During Over-Temperature.
3) During Over-Current.
4) If output is pulled up.
(Note: PG pin is an open-drain output.)
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ISSUED DATE :2006/01/26
REVISED DATE :
Characteristics Curve
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ISSUED DATE :2006/01/26
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REVISED DATE :
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ISSUED DATE :2006/01/26
REVISED DATE :
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM.
GTM reserves the right to make changes to its products without notice.
GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems.
GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office And Factory:
Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C.
TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785
China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China
TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165
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