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參數(shù)資料
| 型號(hào)： | LT1175 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 500mA Negative Low Dropout Micropower Regulator(500mA,F負(fù)輸出，低壓差，微功耗穩(wěn)壓器) |
| 中文描述： | 500mA的低壓差微負(fù)穩(wěn)壓器（500mA的，女負(fù)輸出，低壓差，微功耗穩(wěn)壓器） |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 124K |
| 代理商： | LT1175 |
5
LT1175
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
OUTPUT CURRENT (A)
0
G
20
16
12
8
4
0
0.2
0.4
0.3
0.5
1175 G10
0.1
0.6
0.7
POWER
TRANSISTOR
IN DROPOUT
T
J
= –55
°
C
T
J
= 25
°
C
V
IN
– V
OUT
≥
3V
T
J
= 25
°
V
IN
– V
=
2V
T
J
= 25
°
C
GND pin Current
FREQUENCY (Hz)
R
100
80
60
40
20
0
10
1k
10k
1M
100
100k
V
= 12V
(ADJUSTABLE)
I
OUT
= 100mA
V
IN
– V
OUT
= 2V
C
OUT
= 1
μ
F TANT
1175 G11
RIPPLE REJECTION IS RELATIVELY INDEPENDENT OF
INPUT VOLTAGE AND LOAD FOR CURRENTS BETWEEN
25mA AND 500mA. LARGER OUTPUT CAPACITORS DO
NOT IMPROVE REJECTION FOR FREQUENCIES BELOW
50kHz. AT VERY LIGHT LOADS, REJECTION WILL
IMPROVE WITH LARGER OUTPUT CAPACITORS
V
= 12V
(ADJUSTABLE)
WITH 0.1
μ
F ACROSS
DIVIDER RESISTOR
V
= 5V
(FIXED)
Ripple Rejection
microamperes of current (see Typical Performance Char-
acteristics). Maximum voltage on the SHDN pin is 15V,
–20V with respect to the GND pin and 35V, –5V with
respect to the negative input pin.
I
LIM
Pins:
The two current limit pins are emitter sections
of the power transistor. When left open, they float several
hundred millivolts above the negative input voltage. When
shorted to the input voltage, they increase current limit by
a minimum of 200mA for I
LIM2
and 400mA for I
LIM4
. These
pins must be connected only to the input voltage, either
directly or through a resistor.
OUTPUT Pin:
The OUTPUT pin is the collector of the NPN
power transistor. It can be forced to the input voltage, to
ground or up to 2V positive with respect to ground without
damage or latchup (see Output Voltage Reversal in Appli-
cations Information section). The LT1175 has foldback
current limit, so maximum current at the OUTPUT pin is a
function of input-to-output voltage. See Typical Perfor-
mance Characteristics.
GND Pin:
The GND pin has a quiescent current of 45
μ
A at
zero load current, increasing by approximately 10
μ
A per
mA of output current. At 500mA output current, GND pin
current is about 5mA. Current flows into the GND pin.
SENSE Pin:
The SENSE pin is used in the adjustable
version to allow custom selection of output voltage, with
an external divider set to generate 3.8V at the SENSE pin.
Input bias current is typically 75nA flowing out of the pin.
Maximum forced voltage on the SENSE pin is 2V and –10V
with respect to GND pin.
The fixed 5V version utilizes the SENSE pin to give true
Kelvin connections to the load or to drive an external pass
transistor for higher output currents. Bias current out of
the 5V SENSE pin is approximately 12
μ
A. Separating the
SENSE and OUTPUT pins also allows for a new loop
compensation technique described in the Applications
Information section.
SHDN Pin:
The SHDN pin is specially configured to allow
it to be driven from either positive voltage logic or with
negative only logic. Forcing the SHDN pin 2V either above
or below the GND pin will turn the regulator on. This makes
it simple to connect directly to positive logic signals for
active low shutdown. If no positive voltages are available,
the SHDN pin can be driven below the GND pin to turn the
regulator on. When eft open, the SHDNpin will default ow
to a regulator “on” condition For all voltages below
absolute maximum ratings, the SHDN pin draws only a few
PI
FU
CTIO
N
S
U
U
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LT1175_05 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Negative Low Dropout Micropower Regulator |
| LT1175_10 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Negative Low Dropout Micropower Regulator |
| LT1175-5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Precision Micropower RMS-to-DC Converter |
| LT1175C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Negative Low Dropout Micropower Regulator |
| LT1175CN8 | 功能描述:IC REG LDO NEG ADJ .5A 8-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:800 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.5V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.7V @ 4A 穩(wěn)壓器數(shù)量:1 電流 - 輸出:4A 電流 - 限制（最?。?4.2A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-6，D²Pak（5 引線+接片），TO-263BA 供應(yīng)商設(shè)備封裝:TO-263-5 包裝:帶卷 (TR) 其它名稱:AP1184K525L-13AP1184K525LDITR |
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