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SC4605

Low Input, High Efficiency Synchronous, Step Down Controller

Semtech Corporation 

SC4605

POWER MANAGEMENT

Absolute Maximum Ratings

Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified

in the Electrical Characteristics section is not implied.

Parameter

Symbol

Maximum

Units

Supply Voltage (VCC)

Output Drivers (DRVH, DRVL) Currents

Continuous

Peak

Inputs (VSENSE, COMP, FS/SYNC, ISET)

7

V

+/-0.25

A

+/-1.00

A

-0.3 to 7

V

PHASE

PHASE Pulse tpulse < 100ns

-0.3 to 5.5

V

-2 to 7

V

Operating Ambient Temperature Range

TA

-40 to +85

°C

Storage Temperature Range

TSTG

-65 to +150

°C

Junction Temperature Range

TJ

-55 to +150

°C

Lead Temperature (Soldering) 10 Sec.

TLEAD

+300

°C

All voltages with respect to GND. Currents are positive into, negative out of the specified terminal.

Electrical Characteristics

Unless otherwise specified, VCC = 5V, CT = 470pF, TA = -40°C to 85°C, TA = TJ.

Parameter

Test Conditions

Min

Typ

Max

Unit

Overall

Supply Voltage

2.8

5.5

V

Supply Current, Sleep

FS/SYNC = 0V

10

15

µA

Supply Current, Bias

VCC Turn-on Threshold

VCC Turn-off Hysteresis

Error Amplifier

VCC = 5.5V

1

3

mA

2.7

2.8

V

125

mV

Input Voltage

(Internal Reference)

VSENSE Bias Current

Open Loop Gain (1)

Unity Gain Bandwidth (1)

Slew Rate (1)

VOUT High

VOUT Low

 2004 Semtech Corp.

TA = 25°C

VCC = 2.8V ~ 5.5V, TA = 25°C

Temperature

VCOMP = 0.5 to 2.5V

ICOMP = -2mA

ICOMP = 2mA

2

0.792

0.788

0.786

VCC - 0.5

0.8

0.8

0.8

25

80

4

2

VCC - 0.2

0.1

0.808

0.812

V

0.814

nA

dB

MHz

V/µs

V

0.25

V

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