SC1457 Просмотр технического описания (PDF) - Semtech Corporation

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SC1457

150mA Ultra Low Dropout Regulator with Undervoltage Flag

Semtech Corporation 

SC1457

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VIN = VOUT + 1V, VEN = VIN, IOUT = 100µA, TA = 25°C. Values in bold apply over full operating ambient temperature range.

Parameter

Symbol

Conditions

Min Typ Max

Units

Out (Cont.)

Current Limit

ILIM

Dropout Voltage(1)(3)

VD

IOUT = 1mA

IOUT = 50mA

400

1

50

mA

mV

65 mV

75

IOUT = 100mA

100 125 mV

155

IOUT = 150mA

150 190 mV

230

Output Voltage Noise

en

10Hz to 100kHz, IOUT = 50mA, COUT = 1µF

135

10Hz to 100kHz, IOUT = 50mA, COUT = 100µF

110

Power Supply Rejection Ratio PSRR

f = 120Hz

60

µVRMS

dB

EN

Enable Input Threshold

VIH

VIL

Enable Input Bias Current(4)

IEN

FLG

2.25V ≤ VIN ≤ 6.5V

2.25V ≤ VIN ≤ 6.5V

0V ≤ VEN ≤ VIN

1.6

V

0.4

-0.5 0 +0.5 µA

Flag Threshold

VTH(FLG)

Under voltage condition (below nominal)

-4

-6

-8

%

-4

-12

Output Logic Low Voltage

VFLG

Flag Leakage Current

IFLG

Over Temperature Protection

IFLG = 1mA, undervoltage condition

Flag OFF, VFLG = 0V to 6.5V

0.4

V

-1 0.1 +1 µA

High Trip Level

Hysteresis

THI

THYST

150

°C

20

°C

NOTES:

(1) Low duty cycle pulse testing with Kelvin connections required.

(2) VIN(MIN) = 2.25V.

(3) Defined as the input to output differential at which the output voltage drops 100mV below the value measured

at a differential of 1V. Not measurable on 1.5V and 1.8V parts due to minimum VIN constraints.

(4) Guaranteed by design.

 2004 Semtech Corp.

3

www.semtech.com

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