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US1207-33CM の電気的特性と機能

US1207-33CMのメーカーはUNISEMです、この部品の機能は「1A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE & FIXED REGULATOR」です。


製品の詳細 ( Datasheet PDF )

部品番号 US1207-33CM
部品説明 1A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE & FIXED REGULATOR
メーカ UNISEM
ロゴ UNISEM ロゴ 




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US1207-33CM Datasheet, US1207-33CM PDF,ピン配置, 機能
US1206/1207/1208/1209
1A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE & FIXED REGULATOR
PRELIMINARY DATASHEET
FEATURES
DESCRIPTION
Low Droput Voltage (500mV at 1A)
1% Voltage Reference Accuracy
Low Ground Current
10uA Quiescent Current in Shutdown
(US1207,1208)
Fast Transient Response
Current Limit and Thermal Shutdown
Error Flag Signal for Output out of Regulation
(US1207,1209)
Pin Compatible with MIC39100/101/102 series
APPLICATIONS
2.5V Supply from 3.3V Input for the new genera-
tion of Logic ICs
Computer Mother Board, Add on Cards
High Efficiency Post Regulator in SMPS
The US1206 family of devices are ultra low dropout 1A
regulators using PNP transistor as the pass element.
These products are ideal when a single input supply is
available only and the dropout voltage is less than 1V,
exceeding the minimum dropout characteristics of NPN/
PNP hybrid regulators. One common application of these
regulators are where input is 3.3V and a 2.5V output is
needed.
Besides the low dropout of less than 0.5V, other fea-
tures of the family of the parts are; micropower shutdown
capability and output UVLO detection where Flag pin is
switched low when output is below 5% of its nominal
point. The US1206-XX in SOT223 is pin compatible with
MIC39100-XX, US1207 and 1209 in SO8 power package
are compatible with MIC39101 and 39102 respectively.
TYPICAL APPLICATION
Vout 3
US1206-XX Gnd 2
Vin 1
Vout
C2
1206app1-1.0
Vin
C1
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
0 TO 125
3 LEAD
5 LEAD
TO252
TO263
US1206-18CD US1206-18CY
US1206-25CD US1206-25CY
US1206-33CD US1206-33CY
NA US1207-18CM
NA US1207-25CM
NA US1207-33CM
NA US1208CM
NA US1209CM
8 PIN PLASTIC
SOIC Power
US1206-18CM
US1206-25CM
US1206-33CM
US1207CS
US1207CS
US1207CS
US1208CS
US1209CS
Voltage Pin Functions
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
Adj
Adj
Vin, Vout, GND
Vin, Vout, GND
Vin, Vout, GND
Vin, Vout, GND, Enable, Flag
Vin, Vout, GND, Enable, Flag
Vin, Vout, GND, Enable, Flag
Vin, Vout, GND, Flag, Adj
Vin, Vout, GND, Adj, Enable
Rev. 1.1
6/26/00
2-1

1 Page





US1207-33CM pdf, ピン配列
US1206/1207/1208/1209
US1207,1208
SYM
Ground Current-S.D Activated Iqsd
Enable pin input LO voltage Venl
Enable pin input HI voltage Venh
Enable pin input LO current
Enable pin input HI current
US1207,1209
Flag Output Threshold Voltage Vthfg
Flag Output Hysterises Voltage Vhys
Flag Output Saturation Voltage Vfsat
TEST CONDITION
Enable=0V
Regulator OFF (Note 4)
Regulator ON (Note 4)
Venl=0V to 0.8V (Note 4)
Venh=2V to Vin (Note 4)
Output Ramping Up
Io=5mA
Io=500uA
MIN TYP MAX
0.01 1
0.8
2
0.1 2
100 600
3.8
0.8
400
230
UNITS
uA
V
V
uA
uA
%Vo
%Vo
mV
mV
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 voltage between Vin and Vout required to main-
tain regulation at Vout. It is measured when the output
voltage drops 1% below its nominal value.
Note 3 : Ground current is the the regulator quiescent
current plus the pass transistor current. The total cur-
rent from the supply is the sum of the load current plus
the ground pin current.
Note 4 : The specification applies for the junction tem-
perature of 0 to +125°C.
Pin DescRIPTIONS
PIN SYMBOL
Adj
US1208,1209
Flag
US1208
Vout
All devices
GND
All devices
Enable
US1207,1209
Vin
All devices
Part Number
US1206-18
US1206-25
US1206-33
US1207-18
US1207-25
US1207-33
US1208
US1209
Output
Voltage
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
1.24V
1.24V
Table 1- Output voltage v.s. part number
Rev. 1.1
6/26/00
PIN DESCRIPTION
A resistor divider from this pin to the Vout pin and ground sets
the output voltage.
An open collector output that switches low when the output
voltage drops about 4% below its expected regulated voltage.
The output of the regulator .A minimum of 2.2uF capacitor
must be connected from this pin to ground.
Ground pin. This pin must be connected to the lowest poten-
tial in the system & all other pins must be at higher potential
with respect to this pin.
Enable pin. A low signal or left open on this pin shuts down the
output.This pin must be tied HI or to Vin for normal operation.
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 minimumdrop out
voltage during the load transient response. This pin must al-
ways be 0.6V higher than Vout in order for thedevice to regu-
late properly.
APPLICATION INFORMATION
Stability
The US120X series of regulators require the use of an
output capacitor as part of the frequency compensation
in order to make the regulator stable. A minimum of
2.2uF capacitance and the ESR in the range of 0.5 to 2
ohm insures the stability of the system.
2-3


3Pages


US1207-33CM 電子部品, 半導体
US1206/1207/1208/1209
TYPICAL APPLICATION
US1208
Adj 5
Vout 4
Gnd 3
Vin 2
Flag 1
Vin
C1
R1
R2
R3
Vout
C2
1208app1-1.1
Error Flag
Vo= 1.24 X (1 + R1/R2)
Pin numbers in this
schematic apply only
to TO263(M) package.
Figure 2- Typical application of US1208 in 3.3V to 2.5V regulator
Ref Desig
C1
C2
R1
R2
Description
Capacitor
Capacitor
Resistor
Resistor
Qty Part #
1 10uF, Tantalum
1 10uF, Tantalum
1 127, 1%
1 124, 1%
Manuf
AVX
AVX
2-6
Rev. 1.1
6/26/00

6 Page



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部品番号部品説明メーカ
US1207-33CM

1A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE & FIXED REGULATOR

UNISEM
UNISEM


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