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SP6654

High Efficiency 800mA Synchronous Buck Regulator

Signal Processing Technologies 

PVIN,VIN .............................................................................................. 6V

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

IN

PVIN, PGND, LX current ........................................................................ 2A

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

Operating Temperature ................................................. -40°C to +85°C

Junction Temperature ................................................................. 125°C

Theta JA (10 Pin MSOP) .......................................................... 214°C/w

Theta JA (10 Pin DFN) ............................................................ 48.7°C/w

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.

ELECTRICAL CHARACTERISTICS

VIN=PVIN=VSDN=3.6V, VOUT=VFB, IO = 0mA, TAMB = -40°C to +85°C, The ♦ denotes the specifications which

apply over the full operating temperature range, unless otherwise specified.

PARAMETER

Input Voltage Operating

Minimum Output Voltage

MIN

UVLO

1.0

TYP

MAX

5.5

UNITS

CONDITIONS

V

♦

Result of I measurement at

Q

VIN = PVIN = 5.5V

V

♦ FB Set Voltage, Vr

FB Set Voltage, Vr

Overall Accuracy

On-Time Constant - KON Min,

TON = KON/(VIN-VOUT)

Off-Time Min, T = K /V

OFF

OFF OUT

Constant - KOFF

Off-Time Blanking

0.784 0.800 0.816

±4

±5

1.5 2.25 3.0

1.6

2.4

3.2

100

V

25° C, IO = 200mA Close

Loop. LI = 10µH,

Measured at VIN = 5.5V, no

load, T = 0° C to 70° C

AMB

%

♦

Measured at VIN = 3.6V, 200mA

load, Close Loop

V*µs

♦

Close Loop, LI = 10µH, COUT =

22µF

V*µs

ns

♦

Inductor current limit tripped,

VFB = 0.5V Measured at V' = 2V

TAMB=27° C

PMOS Switch Resistance

0.3 0.6

♦ IPMOS = 200mA

NMOS Switch Resistance

0.3 0.6

♦ INMOS = 200mA

Inductor Current Limit

LX Leakage Current

1.0 1.25 1.50

A

♦ VFB = 0.5V

0.01

3

µA ♦ D0 = D1 = 0

Power Efficiency

VOUT = 2.5V, IO = 200mA

96

TAMB = 27° C

%

92

V = 3.3V, IO = 800mA

OUT

TAMB=27° C

Minimum Guaranteed Load Current 800 900

mA ♦

VIN Quiescent Current

VIN Shutdown Current

VOUT Quiescent Current

VOUT Shutdown Current

20

30

µA

♦ VOUT = 3.3V, VIN = 3.6V and

VIN = 5.5V

1

500

nA ♦ D1 = D0 = 0V

2

5

µA ♦ VOUT = 3.3V

1

500

nA ♦ D1 = D0 = 0V

Date: 2/1/05

SP6654 High Efficiency 800mA Synchronous Buck Regulator

2

© Copyright 2005 Sipex Corporation

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