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US1175CM の電気的特性と機能

US1175CMのメーカーはUNISEMです、この部品の機能は「7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR」です。


製品の詳細 ( Datasheet PDF )

部品番号 US1175CM
部品説明 7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
メーカ UNISEM
ロゴ UNISEM ロゴ 




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US1175CM Datasheet, US1175CM PDF,ピン配置, 機能
US1175
FEATURES
7.5A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
PRELIMINARY DATASHEET
DESCRIPTION
0.5V Dropout at 7.5A (Equivalent of 67mΩ)
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-in Thermal Shutdown
APPLICATIONS
3.3V to 2.7V Intel I740 chip set.
The US1175 product is a 7.5A regulator with extremely
low dropout voltage using a proprietary Bipolar pro-
cess that achieves comparable equivalent on re-
sistance to that of discrete MOSFETs. This product is
specifically designed to provide well regulated supply for
applications requiring very low dropout such as
2.8V from 3.3V ATX power supplies where the same
efficiency as the switcher can be achieved without
the cost and complexity associated with switching
regulators. One such application is the new graphic
chip sets that requires 2.7V supply such as the Intel
I740 chip set.
TYPICAL APPLICATION
3.3V
C1
Vin 5
US1175
Vctrl 4
Vout 3
Adj 2
Vsense 1
1175app1-1.0
5V
C2
2.7V
R1
C3
R2
Typical application of US1175 .
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 125
5 PIN PLASTIC 5 PIN PLASTIC 8 PIN PLASTIC
TO263 (M) POWER FLEX (P) SOIC (S)
US1175CM
US1175CP
US1175CS
Rev. 1.2
11/29/99
2-1

1 Page





US1175CM pdf, ピン配列
US1175
ELECTRICAL SPECIFICATIONS
PARAMETER
Control Pin Current
Adjust Pin Current
SYM
Iadj
TEST CONDITION
Vadj=0V for all below conditions.
Vctrl=2.75V,Vin=2.05V,Io=1.5A
Vctrl=2.75V,Vin=2.05V,Io=3A
Vctrl=2.75V,Vin=2.05V,Io=5A
Vctrl=2.75V,Vin=2.05V,Io=7.5A
Vctrl=2.75V,Vin=2.05V,Vadj=0V,
MIN
TYP MAX UNITS
15 mA
30
50
75
50 120 uA
Note 1 : Low duty cycle pulse testing with Kelvin con-
nections are required in order to maintain accurate data.
Note 2 : Drop-out voltage is defined as the minimum
differential between Vin and Vout required to maintain
regulation at Vout. It is measured when the output volt-
age drops 1% below its nominal value.
Note 3 : Minimum load current is defined as the mini-
mum current required at the output in order for the out-
put voltage to maintain regulation. Typically the resistor
dividers are selected such that it automatically main-
tains this current.
PIN DESCRIPTIONS
PIN #
1
2
3
4
5
PIN SYMBOL PIN DESCRIPTION
Vsense This pin is the positive side of the reference which allows remote load sensing
to achieve excellent load regulation.
Adj A resistor divider from this pin to the Vout pin and ground sets the output voltage.
Vout The output of the regulator. A minimum of 10uF capacitor must be connected from this
pin to ground to insure stability.
Vctrl
This pin is the supply pin for the internal control circuitry as well as the base drive for
the pass transistor.This pin must always be higher than the Vout pin in order for
the device to regulate.(see specifications)
Vin The input pin of the regulator.Typically a large storage capacitor is connected from this
pin to ground to insure that the input voltage does not sag below the minimum drop
out voltage during the load transient response. This pin must always be higher than
Vout in order for the device to regulate.(see specifications)
Rev. 1.2
11/29/99
2-3


3Pages





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共有リンク

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部品番号部品説明メーカ
US1175CM

7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

UNISEM
UNISEM
US1175CP

7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

UNISEM
UNISEM
US1175CS

7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

UNISEM
UNISEM


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