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SC4601EVB

Low Input, High Efficiency Synchronous, Step Down Controller

Semtech Corporation 

SC4601

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless otherwise specified, VCC = 3.3V, RT = 59Kohm, TA = -40°C to 85°C, TA = TJ.

Parameter

Test Conditions

Error Amplifier (Cont.)

VCOMP High

VCOMP Low

Oscillator

ICOMP = -2mA

ICOMP = 2mA

Initial Accuracy

Minimum Operation Frequency (1)

TA = 25°C, VSYNC/SLEEP = HIGH

Maximum Operation Frequency (1)

SYNC/SLEEP Low Threshold

SYNC/SLEEP High Threshold

Ramp Peak to Valley (1)

VIN ≤ 3.6V

VIN ≤ 3.6V

Ramp Peak Voltage (1)

Ramp Valley Voltage (1)

Sleep, Soft Start, Current Limit

Sleep Input Bias Current

VSYNC/SLEEP = 0V

Soft Start Time (1)

Current Limit Threshold

Bias Current, TJ = 25°C

Temperature Coefficient

Current Limit Blank Time (1)

N-Channel and P-Channel Driver Outputs

Pull Up Resistance (PDRV) (2)

Pull Down Resistance (PDRV) (2)

Pull Up Resistance (NDRV) (2)

Pull Down Resistance (NDRV) (2)

PDRV Output Rise Time (1)

PDRV Output Fall Time (1)

Vcc = 3.3V, IOUT = -100mA (source)

Vcc = 3.3V, IOUT = 50mA (sink)

Vcc = 3.3V, IOUT = -100mA (source)

Vcc = 3.3V, IOUT = 100mA (sink)

Vgs = 3.3V, COUT = 1.0nF

Vgs = 3.3V, COUT = 1.0nF

Min

Typ

Max

2.8

3.1

0.15

0.3

260

300

340

100

600

0.8

2.0

1.3

1.5

1.7

1.85

1.9

0.3

0.35

-1

2.4

-43

-50

-57

0.15

150

3

3

3

3

9

12

Unit

V

V

kHz

kHz

kHz

V

V

V

V

V

µA

ms

µA

%/°C

ns

ohms

ohms

ohms

ohms

ns

ns

 2006 Semtech Corp.

3

www.semtech.com

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