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PDF GT2113 Data sheet ( 特性 )

部品番号 GT2113
部品説明 CMOS POSITIVE VOLTAGE REGULATOR
メーカ GTM
ロゴ GTM ロゴ 

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GT2113 Datasheet, GT2113 PDF,ピン配置, 機能
www.DataSheet4U.com
ISSUED DATE :2006/04/18
REVISED DATE :
G T 2 11 3
300m A CMO S Po si ti ve Vo ltag e Regu l ato r
Description
The GT2113 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 GT2113 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
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Cordless Phones
Electronic Scales
Package Dimensions
Functional Block Diagram
Typical Application Circuit
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.
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GT2113 pdf, ピン配列
ISSUED DATE :2006/04/18
REVISED DATE :
Ordering Information ( contd. )
Part Number
GT2113-15
GT2113-25
GT2113-28
GT2113-30
GT2113-33
GT2113-35
GT2113-37
GT2113-50
Marking
3A152
XXXX
3A252
XXXX
3A282
XXXX
3A302
XXXX
3A332
XXXX
3A352
XXXX
3A372
XXXX
3A502
XXXX
Output Voltage
1.5V
2.5V
2.8V
3.0V
3.3V
3.5V
3.7V
5.0V
Part Number
GT2113-18
GT2113-27
GT2113-29
GT2113-31
GT2113-34
GT2113-36
GT2113-38
GT2113-2H
Marking
3A182
XXXX
3A272
XXXX
3A292
XXXX
3A312
XXXX
3A342
XXXX
3A362
XXXX
3A382
XXXX
3A2H2
XXXX
Output Voltage
1.8V
2.7V
2.9V
3.1V
3.4V
3.6V
3.8V
2.85V
Detailed Description
The GT2113 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 GT2113 switches from voltage mode to current mode when the load exceeds the rated output current.
This prevents over-stress. The GT2113 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 GT2113 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 ~ 0.01 F. 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 GT2113 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.)
3/7


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GT2113 電子部品, 半導体
ISSUED DATE :2006/04/18
REVISED DATE :
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