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US1150CSのメーカーはUNISEMです、この部品の機能は「4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR」です。 |
部品番号 | US1150CS |
| |
部品説明 | 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR | ||
メーカ | UNISEM | ||
ロゴ | |||
このページの下部にプレビューとUS1150CSダウンロード(pdfファイル)リンクがあります。 Total 5 pages
FEATURES
0.7V Dropout at 4A
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-in Thermal Shutdown
APPLICATIONS
3.3V to 2.7V Intel I740 chip set.
US1150
4A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
PRELIMINARY DATASHEET
DESCRIPTION
The US1150 product is a 4A 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 2.8V or lower voltages from
3.3V ATX power supplies where high efficiency of
a switcher can be achieved without the cost and
complexity associated with switching regulators.
One such application is the new graphic chip sets that
require anywhere from 2.4V to 2.7V supply such as the
Intel I740 chip set.
TYPICAL APPLICATION
3.3V
C1
Vin 5
US1150
Vctrl 4
Vout 3
Adj 2
Vsense 1
1150app1-1.0
5V
C2
2.7V
R1
C3
R2
Typical application of US1150 in a 3.3V to 2.7V for I740 chip.
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 125
5 PIN PLASTIC 5 PIN PLASTIC 8 PIN PLASTIC
TO263 (M) POWER FLEX (P) SOIC (S)
US1150CM
US1150CP
US1150CS
Rev. 1.2
10/28/99
2-1
1 Page US1150
ELECTRICAL SPECIFICATIONS
PARAMETER
Control Pin Current
SYM
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=4A
MIN
TYP MAX UNITS
6 10 mA
30 60
33 70
Adjust Pin Current
Iadj Vctrl=2.75V,Vin=2.05V,Vadj=0V,
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
10/28/99
2-3
3Pages | |||
ページ | 合計 : 5 ページ | ||
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PDF ダウンロード | [ US1150CS データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
US1150CM | 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR | UNISEM |
US1150CP | 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR | UNISEM |
US1150CS | 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR | UNISEM |