SC1454(2000) 데이터 시트보기 (PDF) - Semtech Corporation

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SC1454
(Rev.:2000)

Dual 150mA Ultra Low Dropout, Low Noise Regulator

Semtech Corporation 

SC1454

POWER MANAGEMENT

Electrical Characteristics

Unless specified: TA = 25°C, VIN = VOUT + 1V, IOUTA = IOUTB = 1mA, CIN = COUT = 1.0 µF, VENA = VENB = VIN.

Values in bold apply over full operating temperature range.

Parameter

Symbol

Conditions

Min Typ Max Units

OUTA, OUTB (Cont.)

Dropout Voltage(1)(2)

VD

IOUT = 1mA

IOUT = 50mA

1

mV

52 70

90

IOUT = 150mA

155 210

270

Current Limit

Ripple Rejection

Output Voltage Noise

ENA, ENB

ILIM

PSRR

en

f = 120Hz, CBYP = 10nF

f = 10Hz to 100kHz, IOUT =50mA,

CBYP = 10nF, COUT = 2.2µF

f = 10Hz to 1MHz, IOUT =50mA,

CBYP = 10nF, COUT = 2.2µF

400

60

50

55

mA

dB

µVRMS

Enable Input Threshold

VIH

VIL

Enable Input Bias Current(3)

IEN

BYP

0V £ VENA/B £ VIN

1.6

V

0.4

-0.5

0.5 µA

Start-Up Rise Time

tr

SETA

CBYP = 10nF

1.25

ms

Sense/Select Threshold

SETA Reference Voltage

VTH

VSETA

SETA Input Leakage Current(3) ISETA

Over Temperature Protection

VIN = 2.5V, IOUT = 1mA

0mA £ IOUT £ 150mA, 2.5V £ VIN £ 5.5V

VSETA = 1.3V

20

40

80

mV

-1% 1.250 +1% V

-2%

+2%

0.015 50

nA

High Trip Level

THI

150

°C

Hysteresis

THYST

20

°C

NOTES:

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

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

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

(3) Guaranteed by design.

ã 2000 Semtech Corp.

3

www.semtech.com

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