intersil ISL6269B DATA SHEET

®

ISL6269B

Data Sheet May 30, 2007

High-Performance Notebook PWM
Controller with Audio-Frequency Clamp

The ISL6269B IC is a Single-Phase Synchronous-Buck
PWM controller featuring Intersil's Robust Ripple Regulator

3

(R

) technology that delivers truly superior dynamic
response to input voltage and output load transients.
Integrated MOSFET drivers and bootstrap diode result in
fewer components and smaller implementation area.

Intersil’s R

3

technology combines the best features of fixed­frequency PWM and hysteretic PWM while eliminating many
of their shortcomings. R
modulator that synthesizes an AC ripple voltage signal V

3

technology employs an innovative

,

R

analogous to the output inductor ripple current. The AC signal
V

enters a window comparator where the lower threshold is

R

the error amplifier output V
programmable voltage reference V
of the PWM signal. The voltage reference V

, and the upper threshold is a

COMP

resulting in generation

W,

sets the steady-

W

state PWM frequency. Both edges of the PWM can be
modulated in response to input voltage transients and output
load transients, much faster than conventional fixed­frequency PWM controllers. Unlike a conventional hysteretic
converter, the ISL6269B h as an error amplifier that provides
±1% voltage regulation at the FB pin.

The ISL6269B has a 1.5ms digital soft-start and can be
started into a pre-biased output voltage. A resistor divider is
used to program the output voltage setpoint. The ISL6269B
can be configured to operate in continuous-conduction­mode (CCM) or diode-emulation-mode (DEM), which
improves light-load efficiency. In CCM the controller always
operates as a synchronous rectifier however, when DEM is
enabled the low-side MOSFET is permitted to stay off,
blocking negative current flow into the low-side MOSFET
from the output inductor.

Pinout

ISL6269B

(16 LD 4x4 QFN)

TOP VIEW

FSET

BOOT

12

11

10

9

VO

PVCC

LG

PGND

ISEN

VIN

VCC

FCCM

EN

1

2

3

4

PGOODUGPHASE

1516 14 13

GND

6578

FB

COMP

FN6280.2

Features

• High performance R3 technology

• Fast transient response

• ±1% regulation accuracy: -10°C to +100°C and

-40° to +100°C

• Wide input voltage range: +5.0V to +25.0V

• Output voltage range: +0.6V to +3.3V

• Wide output load range: 0A to 25A

• Selectable diode emulation mode for increased light load
efficiency

• Programmable PWM frequency: 200kHz to 600kHz

• Pre-biased output start-up capability

• Integrated MOSFET drivers and bootstrap diode

• Internal digital soft-start

• Power good monitor

• PWM minimum frequency above audible spectrum

• Fault protection

- Undervoltage protection

- Soft crowbar overvoltage protection

- Low-side MOSFET r

overcurrent protection

DS(ON)

- Over-temperature protection

- Fault identification by PGOOD pull down resi stance

• Pb-free plus anneal available (RoHS compliant)

Applications

• PCI express graphical processing unit

• Auxiliary power rail

•VRM

• Network adapter

Ordering Information

TEMP

PART NUMBER

(Note)

ISL6269BCRZ* 62 69BCRZ -10 to +100 16 Ld 4x4 QFN L16.4x4
ISL6269BIRZ* 62 69BIRZ -40 to +100 16 Ld 4x4 QFN L16.4x4

*Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.

PART

MARKING

RANGE

(°C)

PACKAGE

(Pb-free)

PKG.

DWG. #

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

Block Diagram

VIN

GND

VCC

2

EN

PACKAGE BOTTOM

V

REF

−

OVP

+

−

UVP

+

+

+

gmV

−

gmV

−

PWM FREQUENCY

CONTROL

−

+

IN

V

W

−
+

R

PWM

V

R

O

+

C

R

V

COMP

−

+

Q

S

−

VO

FSET

ISL6269B

BOOT

+

EA

FB

−

EA

POR

DRIVER

DIGITAL SOFT-START

UG

COMP

ISEN

PGOOD

May 30, 2007

FN6280.2

−

I

OC

OCP

+

30Ω

90Ω

FIGURE 1. SCHEMATIC BLOCK DIAGRAM

60Ω

150°OT

PWM CONTROL

SHOOT THROUGH

PROTECTION

DRIVER

PHASE

PVCC

LG

PGND

FCCM

Typical Application

5V

R

VCC

R

PGOOD

PGOOD

PVCC

ISL6269B

ISL6269B

VIN

UG

V

IN

5V TO 25V

C

IN

Q

HIGH_SIDE

C

PVCC

R

COMP

C

VCC

C

COMP1

VCC

GND

FCCM

EN

COMP

BOOT

PHASE

ISEN

LG

PGND

C

BOOT

R

SEN

L

OUT

Q

LOW_SIDE

V

OUT

0.6V TO 3.3V

C

OUT

C

COMP2

R

BOTTOM

R

FB

VO

TOP

FSET

FIGURE 2. ISL6269B TYPICAL APPLICATION SCHEMATIC

3

R

FSET

C

FSET

FN6280.2

May 30, 2007

ISL6269B

Absolute Voltage Ratings

ISEN, VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +28V

VCC, PGOOD to GND. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7.0V

PVCC to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7.0V

GND to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V

EN, FCCM . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to GND, VCC +3.3V

VO, FB, COMP, FSET . . . . . . . . . . . . . . . -0.3V to GND, VCC +0.3V

PHASE to GND (DC). . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +28V

(<100ns Pulse Width, 10μJ). . . . . . . . . . . . . . . . . . . . . . . . . -5.0V

BOOT to GND, or PGND. . . . . . . . . . . . . . . . . . . . . . .-0.3V to +33V

BOOT to PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +7V

UG (DC). . . . . . . . . . . . . . . . . . . . . . .-0.3V to PHASE, BOOT +0.3V

(<200ns Pulse Width, 20μJ) . . . . . . . . . . . . . . . . . . . . . . . . -4.0V

LG (DC) . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to PGND, PVCC +0.3V

(<100ns Pulse Width, 4μJ). . . . . . . . . . . . . . . . . . . . . . . . . . -2.0V

Thermal Information

Thermal Resistance (Typical, Notes 1, 2) θJA (°C/W) θJC (°C/W)

QFN Package. . . . . . . . . . . . . . . . . . . . 48 11.5

Junction Temperature Range. . . . . . . . . . . . . . . . . .-55°C to +150°C

Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ISL6269BCRZ . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C

ISL6269BIRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C

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

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

Recommended Operating Conditions

Ambient Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ISL6269BCRZ . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C

ISL6269BIRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C

Supply Voltage (VIN to GND) . . . . . . . . . . . . . . . . . . . . . . 5V to 25V

VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ±5%

PVCC to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ±5%

CAUTION: Stress above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational section of this specification is not implied.

NOTES:

is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

1. θ

JA

Tech Brief TB379.

2. For θ

Electrical Specifications These specifications apply for T

, the “case temp” location is the center of the exposed metal pad on the package underside.

JC

= -40°C to +100°C, unless otherwise stated.

All typical specifications T

A

= +25°C, VCC = 5V, PVCC = 5V, VIN = 15V

A

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

VIN

VIN Input Bias Current

VIN Shutdown Current I

I

VIN

VIN_SHDN

EN = 5V, VIN = 5V - 6.5 10 μA
EN = 5V, VIN = 25V - 26 35 μA
EN = GND, VIN = 25V - 0.1 1.0 μA

VCC and PVCC

VCC Input Bias Current I
VCC Shutdown Current I
PVCC Shutdown Current I

VCC_SHDN

PVCC_SHDN

VCC

EN = 5V , FCCM = GND, FB = 0.65V - 1.7 2.5 mA
EN = GND, VCC = 5V - 0.1 1.0 μA
EN = GND, PVCC = 5V - 0.1 1.0 μA

VCC POR THRESHOLD

Rising VCC POR Threshold Voltage V

VCC_THRTA

= -10°C to +100°C 4.35 4.45 4.55 V

4.33 4.45 4.55 V

Falling VCC POR Threshold Voltage

V

VCC_THFTA

= -10°C to +100°C 4.10 4.20 4.30 V

4.08 4.20 4.30 V

REGULATION

Reference Voltage V

REF

- 0.6 - V

Regulation Accuracy FB connected to COMP -1 - +1 %

PWM

Frequency Range f

SW

f

AUDIO

FCCM = 5V 200 - 600 kHz
FCCM = GND, TA = -10°C to +100°C 19 28 - kHz

FCCM = GND 18 28 - kHz
Frequency-Set Accuracy f
VO Range V
VO Input Leakage I

VO

VO

= 300kHz -12 - +12 %

SW

0.60 - 3.30 V

VO = 0.60V - 1.3 - μA

VO = 3.30V - 7.0 - μA

4

FN6280.2

May 30, 2007

ISL6269B

Electrical Specifications These specifications apply for T

All typical specifications T

= -40°C to +100°C, unless otherwise stated.

A

= +25°C, VCC = 5V, PVCC = 5V, VIN = 15V (Continued)

A

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

ERROR AMPLIFIER

FB Input Bias Current I
COMP Source Current I
COMP Sink Current I
COMP High Clamp Voltage V
COMP Low Clamp Voltage V

COMP_SRC
COMP_SNK

COMP_HC
COMP_LC

FB

FB = 0.60V -0.5 - +0.5 μA

FB = 0.40V, COMP = 3.20V - 2.5 - mA

FB = 0.80V, COMP = 0.30V - 0.3 - mA

FB = 0.40V, Sink 50μA 3.10 3.40 3.65 V

FB = 0.80V, Source 50μA 0.09 0.15 0.21 V

POWER GOOD

PGOOD Pull-down Impedance R

PG_SS

PGOOD = 5mA Sink, TA = -10°C to +100°C 75 95 125 Ω

PGOOD = 5mA Sink 67 95 125 Ω

R

PG_UV

PGOOD = 5mA Sink, TA = -10°C to +100°C 75 95 125 Ω

PGOOD = 5mA Sink 67 95 125 Ω

R

PG_OV

PGOOD = 5mA Sink, TA = -10°C to +100°C 50 63 85 Ω

PGOOD = 5mA Sink 45 63 85 Ω

R

PG_OC

PGOOD = 5mA Sink, TA = -10°C to +100°C 25 32 45 Ω

PGOOD = 5mA Sink 22 32 45 Ω
PGOOD Leakage Current I

PGOOD

PGOOD = 5V - 0.1 1.0 μA
PGOOD Maximum Sink Current (Note 3) - 5.0 - mA
PGOOD Soft-Start Delay t

SS

EN High to PGOOD High, TA = -10°C to +100°C 2.20 2.75 3.30 ms

EN High to PGOOD High 2.20 2.75 3.50 ms

GATE DRIVER

UG Pull-Up Resistance R
UG Source Current (Note 3) I
UG Sink Resistance R
UG Sink Current (Note 3) I
LG Pull-Up Resistance R
LG Source Current (Note 3) I
LG Sink Resistance R
LG Sink Current (Note 3) I
UG to LG Deadtime t
LG to UG Deadtime t

UGPU

UGSRC

UGPD

UGSNK

LGPU

LGSRC

LGPD

LGSNK
UGFLGR
LGFUGR

200mA Source Current - 1.0 1.5 Ω
UG - PHASE = 2.5V - 2.0 - A
250mA Sink Current - 1.0 1.5 Ω
UG - PHASE = 2.5V - 2.0 - A
250mA Source Current - 1.0 1.5 Ω
LG - PGND = 2.5V - 2.0 - A
250mA Sink Current - 0.5 0.9 Ω
LG - PGND = 2.5V - 4.0 - A
UG falling to LG rising, no load - 21 - ns
LG falling to UG rising, no load - 14 - ns

BOOTSTRAP DIODE

Forward Voltage V
Reverse Leakage I

PVCC = 5V, IF = 2mA - 0.58 - V

F

VR = 25V - 0.2 - μA

R

CONTROL INPUTS

EN High Threshold V
EN Low Threshold V
FCCM High Threshold V
FCCM Low Threshold V

FCCMTHR
FCCMTHF

EN Leakage I

FCCM Leakage I

ENTHR

ENTHF

ENL

I

ENH

FCCML

I

FCCMH

EN = 0V - 0.1 1.0 μA
EN = 5.0V - 0.1 1.0 μA
FCCM = 0V - 0.1 1.0 μA
FCCM = 5.0V - 2.0 - μA

2.0 --V

--1.0 V

2.0 --V

--1.0 V

5

FN6280.2

May 30, 2007