SP6120B datasheet(2/22 Pages) SIPEX

2 / 22 page

Date: 5/25/04

SP6120B Low Voltage, AnyFETTM, Synchronous, Buck Controller

SPECIFICATIONS

Unless otherwise specified: 3.0V < VCC <5.5V, 3.0V < BST < 13.2V, ROSC = 18.7kΩ, CCOMP = 0.1µF, CSS = 0.1µF, ENABLE =

3V, CGH = CGL = 3.3nF, VFB = 1.25V, ISP = ISN = 1.25V, SWN = GND = PGND = 0V, -40°C < TAMB <85°C (Note 1)

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.

CC ............................................................................... 7V

BST ........................................................................ 13.2V

BST-SWN .................................................................... 7V

SWN .................................................................. -1V to 7V

GH ..................................................... -0.3V to BST +0.3V

GH-SWN ..................................................................... 7V

All Other Pins ....................................... -0.3V to V

CC +0.3V

Peak Output Current < 10µs

GH, GL ........................................................................ 2A

Operating Temperature Range

SP6120C ................................................ 0°C to +70°C

SP6120E .............................................. -40°C to +85°C

Junction Temperature, T

J ...................................... +125°C

Storage Temperature Range .................. -65˚C to +150˚C

Power Dissipation

Lead Temperature (soldering 10 sec) ................... +300˚C

ESD Rating ........................................................ 2kV HBM

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

QUIESCENT CURRENT

VCC Supply Current

No Switching

0.95

1.8

VCC Supply Current (Disabled)

ENABLE = 0V

µA

BST Supply Current

No Switching, VBST = VCC

-1

µA

No Switching, VCC = 5V, VBST = 10V

100

150

µA

ERROR AMPLIFIER

Error Amplifier Transconductance

600

µs

COMP Sink Current

VFB = 1.35V, COMP = 0.5V, No Faults

µA

COMP Source Current

VFB = 1.15V, COMP = 1.6V

µA

COMP Output Impedence

MΩ

VFB Input Bias Current

100

REFERENCE

Error Amplifier Reference

Trimmed with Error Amp in Unity Gain

1.238

1.250

1.262

VFB 3% Low Comparator

%VREF

VFB 3% High Comparator

%VREF

OSCILLATOR & DELAY PATH

Oscillator Frequency

270

300

330

kHz

Oscillator Frequency #2

ROSC = 10.2kΩ

450

500

550

kHz

Duty Ratio

Loop In Control -100% DC possible

ROSC Voltage

Information Only - Moves

0.65

with Oscillator Trim

Minimum GH Pulse Width

VCC > 4.5V, Ramp up COMP

120

250

Voltage > 0.6V until GH starts

Switching

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