SP6650 datasheet(2/17 Pages) SIPEX

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Date: 5/25/04

SP6650 High Efficiency 600mA Synchronous Buck Regulator

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation

of the device at these ratings or any other above those

indicated in the operation sections of the specifications

below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may

affect reliability.

IN, VIN. ........................................................... 7V

All other pins .............................. -0.3V to V

IN +0.3V

IN, PGND, LX current .................................... 2A

Storage Temperature .................... -65°C to 150°C

Lead Temperature (Soldering 10sec) .......... 300°C

Specifications apply for -40°C to +85°C, V

OUT = 3.3V, VIN = 3.6V, ILIM = SHDN = VIN, FB = GND, L1 = 22µH, COUT = CIN = 47µF, unless otherwise noted.

PARAMETER

MIN.

TYP.

MAX.

UNITS

CONDITIONS

Input Voltage Operating

UVLO

6.5

Range

Undervoltage Lockout Threshold

2.6

2.7

2.8

VIN Rising

Undervoltage Lockout Hysteresis

120

FB Set Voltage, VREF

1.23

1.25

1.27

VOUT tied to FB Pin

VREF Load Regulation

0.5

ILOAD = 0 to 600mA

VIN = 3.6V, VOUT = 3.3V

VREF Line Regulation

0.5

VIN = 3.6V to 6.5V

VOUT = 3.3V, ILOAD = 200mA

VREF Line and Load Regulation

0.65

VIN = 3.6V to 6.5V

ILOAD = 0 to 600mA

VOUT Accuracy

3.23

3.30

3.37

ILOAD = 100mA, VIN = 3.6V

VOUT Line and Load Regulation

3.17

3.30

3.43

VIN = 3.6V to 6.5V

ILOAD = 0 to 600mA

On-Time Constant - KON

2.7

µs*V

Minimum TON = KON/ (VIN-VOUT)

PMOS Switch Resistance

0.4

0.8

Ω

IPMOS = 200mA

NMOS Switch Resistance

0.3

0.8

Ω

INMOS = 200mA

VIN Pin Quiescent Current

150

µA

SHDN = VIN = FB = 1.5V

VIN Pin Shutdown Current

0.3

500

SHDN = 0V

VOUT Pin Quiescent Current

µA

SHDN = VIN = FB = 1.5V

VOUT Pin Shutdown Current

0.1

500

SHDN = 0V

Power Efficiency

ILOAD = 600mA

ILOAD = 100mA

ILOAD = 1mA

Minimum Guaranteed Load

600

700

ILIM = VIN

Current

300

350

ILIM = 0V

Inductor Current Limit

0.75

0.95

1.15

ILIM = VIN

0.40

0.50

0.60

ILIM = 0V

Inductor Current Limit

-100

ppm/°C

ELECTRICAL CHARACTERISTICS

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