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参数资料
| 型号： | G914 |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 150mA Low-Dropout Linear Regulators |
| 中文描述： | 150mA的低压差线性稳压器 |
| 文件页数： | 3/6页 |
| 文件大小： | 98K |
| 代理商： | G914 |
Pin Description
Ver 0.1 Preliminary
Nov 05, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G914
Global Mixed-mode Technology Inc.
PIN
1
NAME
FUNCTION
IN
Regulator Input. Supply voltage can range from +2.5V to +5.5V. Bypass with 1μF to GND
Ground. This pin also functions as a heatsink. Solder to large pads or the circuit board ground plane to
maximize thermal dissipation.
Active-Low Shutdown Input. A logic low reduces the supply current to less than 1
μ
A. Connect to IN for normal
operation.
Adjust (Input): Adjustable regulator feedback input. It can connect to an external resistor divider for ad-
justable output voltage. It also must connect
≥
470pF ceramic capacitor from ADJ pin to GND for reduce
output noise.
Regulator Output. Fixed or adjustable from +2.5V to +5.5V. Sources up to 150mA. Bypass with a 1μF,
＜
0.2
typical ESR capacitor to GND.
2
GND
3
SHDN
4
ADJ
5
OUT
Detailed Description
The block diagram of the G914 is shown in Figure 1. It
consists of an error amplifier, 1.25V bandgap refer-
ence, PMOS output transistor, shutdown logic, over
current protection circuit, and over temperature protec-
tion circuit.
The G914 can be adjusted to a specific output voltage
by using two external resistors (Figure 2). The resis-
tors set the output voltage based on the following
equation:
R2
V
OUT
=1.250V X
R1 + 1
This equation is correct due to the configuration of the
bandgap reference. The bandgap voltage is relative to
the output, as seen in the block diagram. Traditional
regulators normally have the reference voltage relative
to ground and have a different V
OUT
equation. Resistor
values are not critical because ADJ (adjust)has a high
input impedance, but for best results use resistors of
470k
or less. A capacitor from ADJ to ground pro-
vides greatly improved noise performance.
Figure 1. Functional Diagram
SHDN
IN
OUT
LOGIC
ref
＋
GND
PROTECTION
ADJ
SHUTDOWN
1.25V
ERROR
AMP.
OVER TEMP. &
OVER CURRENT
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| G9144-1408M-150B | 制造商:Glenair Inc 功能描述:ADAPTER - Bulk |
| G914A | 制造商:GMT 制造商全称:Global Mixed-mode Technology Inc 功能描述:300mA High PSRR, Low-Noise LDO Regulators |
| G914AF | 制造商:GMT 制造商全称:Global Mixed-mode Technology Inc 功能描述:300mA High PSRR, Low-Noise LDO Regulators |
| G914B | 制造商:GMT 制造商全称:Global Mixed-mode Technology Inc 功能描述:300mA High PSRR, Low-Noise LDO Regulators |
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