SC4216STRT(2006) 데이터 시트보기 (PDF) - Semtech Corporation

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SC4216STRT
(Rev.:2006)

Very Low Input/Very Low Dropout 3 Amp Regulator With Enable

Semtech Corporation 

SC4216

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VEN = VIN, VFB = VO, VIN = 1.45V to 5.5V, VO = VIN -0.5V and IO = 10µA to 3A.

Values in bold apply over the full operating temperature range.

Parameter

Symbol

Test Conditions

Min Typ Max Units

VO (Cont.)

Dropout Voltage(1)(2)

IO = 2A

300 400

mV

500

IO = 2.5A

VD

IO = 3A

350 450

600 mV

450 550

700 mV

IO = 3A, 1.6V ≤ VIN ≤ 5.5V

400 500

mV

650

Minimum Load Current(3)

IO

Current Limit

ICL

Feedback

VIN = VO + 0.5V

10

µA

3.5

4.5

5.0

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) Low duty cycle pulse testing with Kelvin connections required.

(2) Defined as the input to output differential at which the output voltage drops to 1.5% below the value measured at a

differential of 0.8V.

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

(4) Guaranteed by design.

(5)

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

amplifier and connects VFB instead.

 2006 Semtech Corp.

3

www.semtech.com

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