SC4211EVB データシートの表示（PDF） - Semtech Corporation

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SC4211EVB

Very Low Input /Very Low Dropout 1 Amp Regulator With Enable

Semtech Corporation 

SC4211

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VEN = VIN, VFB = VO, VIN = 1.40V to 6.0V, IO = 10µA to 1A.

Values in bold apply over the full operating temperature range.

Parameter

Symbol

Test Conditions

Min Typ Max Units

VO (Cont.)

Dropout Voltage(1)(2)

VDO

IO = 1A

200 400

mV

500

Minimum Load Current(3)

IO

Current Limit(4)

ICL

Feedback

VIN = VO + 0.5V

10

µA

1.1

1.5

2.0

A

Reference Voltage(1)

Feedback Pin Current(4)

Feedback Pin Threshold (5)

EN

VREF

IADJ

VTH(FB)

VIN = 3.3V, VFB = VOUT, IO = 10mA

Full IOUT , and VIN Range

VFB = VREF

0.495 0.5 0.505 V

0.490

0.510

80

200 nA

0.05 0.16 0.40

V

Enable Pin Current

IEN

Enable Pin Threshold

VIH

VIL

Over Temperature Protection

VEN = 0V, VIN = 3.3V

VIN = 3.3V

VIN = 3.3V

1.5

10

µA

1.6

V

0.4

High Trip level

THI

160

°C

Hysteresis

THYST

10

°C

Notes:

(1)

(2)

(3)

(4)

(5)

Low duty cycle pulse testing with Kelvin connections required.

VDO = VIN -VO when VO decreases by 1.5% of its nominal output voltage with VIN = VO +0.8V.

Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this requirement.

Guaranteed by design.

When VFB exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from the error

amplifier and connects VFB instead.

 2007 Semtech Corp.

3

www.semtech.com

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