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SC4603

Very Low Input, MHz Operation, High Efficiency Synchronous Buck

Semtech Corporation 

SC4603

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 (PDRV, NDRV) Currents Continuous

6

V

±0.25

A

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

6

V

Phase

-0.3 to 5.5

V

Phase Pulse tpulse < 50ns

-2 to 6

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

Thermal Impedance Junction to Case

θJC

41.9

°C/W

Thermal Impedance Junction to Ambient

θJA

113.1

°C/W

Lead Temperature (Soldering) 10 Sec.

TLEAD

300

°C

ESD Rating (Human Body Model)

ESD

2

kV

Electrical Characteristics

All voltages are with respect to GND. Currents are positive into,

negative out of the specified terminal.

Unless otherwise specified, VCC = 3.3V, RT = 21Kohm, TA = -40°C to 85°C, TA = TJ.

Parameter

Test Conditions

Min

Typ

Max

Unit

Overall

Supply Voltage

2.25

5.5

V

Supply Current, Sleep

Supply Current, Operating

VSYNC/SLEEP = 0V

10

15

µA

2

3

mA

VCC Turn-on Threshold

VCC Turn-off Hysteresis

Error Amplifier

2

2.25

V

100

mV

Internal Reference

Internal Reference Change

VSENSE Bias Current

VCC = 3.3V, TA = 25°C

VCC = 3.3V, TA = -40°C to 85°C

VCC = 2.25V to 3.3V, TA = 25°C

VCC = 3.3V to 5.5V, TA = 25°C

495

500

505

mV

492

508

mV

-0.15

0.1

0.35

%/V

-0.4

-0.2

0

%/V

200

nA

Open Loop Gain (1)

Unity Gain Bandwidth (1)

VCOMP = 0.5V to 2.5V

80 (1)

90

8

dB

MHz

Slew Rate (1)

2.4

V/µs

 2008 Semtech Corp.

2

www.semtech.com

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