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SC4205EVB

Very Low Dropout 1 Amp Regulator With Enable

Semtech Corporation 

SC4205

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VEN = VIN. Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2V to 5.5V and IO = 10µA to 1A.

Fixed Options (VADJ = GND): VIN = (VO + 0.5V) to 5.5V and IO = 0A to 1A. Values in bold apply over TJ = -40°C to 125°C

Parameter

Symbol

Test Conditions

Min Typ

Max Units

VO (Cont.)

Minimum Load Current(3)

Current Limit

ADJ

Reference Voltage(1)

IO

ICL

VREF

Adjust Pin Current(4)

Adjust Pin Threshold(5)

EN

IADJ

VTH(ADJ)

Enable Pin Current

IEN

Enable Pin Threshold

VIH

VIL

Over Temperature Protection

High Trip level

Hysteresis

THI

THYST

VIN = 2.2V, VADJ = VOUT, IO = 10mA

VADJ = VREF

VEN = 0V, VIN = 3.3V

VIN = 3.3V

VIN = 3.3V

1

10

µA

1.6 1.33 3.5

A

1.188 1.200 1.212 V

1.176

1.224

30

200 nA

0.05 0.20 0.40

V

1.5

10

µA

1.6

V

0.4

170

°C

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 voltage drops to 1% below the value

measured at a differential of 0.7V.

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

requirement. Adjustable versions only.

(4) Guaranteed by design.

(5) When VADJ exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from

the error amplifier and connects V instead.

ADJ

 2004 Semtech Corp.

3

www.semtech.com

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