intersil ISL97516 DATA SHEET

®

www.BDTIC.com/Intersil

ISL97516

Data Sheet May 9, 2008

600kHz/1.2MHz PWM Step-Up Regulator

The ISL97516 is a high frequency, high efficiency step-up
voltage regulator operated at constant frequency PWM
mode. With an internal 2.0A, 200mΩ MOSFET, it can deliver
up to 1A output current at over 90% efficiency. The
selectable 600kHz and 1.2MHz allows smaller inductors and
faster transient response. An external compensation pin
gives the user greater flexibility in setting frequency
compensation allowing the use of low ESR Ceramic output
capacitors.

When shut down, it draws <1µA of current and can operate
down to 2.3V input supply. These features along with

1.2MHz switching frequency makes it an ideal device for
portable equipment and TFT-LCD displays.

The ISL97516 is available in an 8 Ld MSOP package with a
maximum height of 1.1mm. The device is specified for
operation over the full -40°C to +85°C temperature range.

Pinout

ISL97516

(8 LD MSOP)

TOP VIEW

COMP SS

1

FB FSEL

2

EN VDD

3

GND LX

4

8

7

6

5

FN9261.3

Features

• >90% Efficiency

• 2.0A, 200mΩ Power MOSFET

• 2.3V to 5.5V Input

• Up to 25V Output

• 600kHz/1.2MHz Switching Frequency Selection

• Adjustable Soft-Start

• Internal Thermal Protection

• 1.1mm Max Height 8 Ld MSOP Package

• Pb-free Available (RoHS compliant)

Applications

• TFT-LCD displays

• DSL modems

• PCMCIA cards

• Digital cameras

• GSM/CDMA phones

• Portable equipment

• Handheld devices

Ordering Information

PART

NUMBER

(Note)

ISL97516IUZ 7516Z 8 Ld MSOP MDP0043
ISL97516IUZ-T* 7516Z 8 Ld MSOP MDP0043
ISL97516IUZ-TK* 7516Z 8 Ld MSOP MDP0043
*Please refer to TB347 for details on reel specifications.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plus anneal 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

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, 2008. All Rights Reserved

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

ISL97516

www.BDTIC.com/Intersil

Absolute Maximum Ratings (T

LX to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27V

V

to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V

DD

COMP, FB, EN, SS, FSEL to GND . . . . . . . . . -0.3V to (V

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = T

Electrical Specifications V

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

IQ1 Quiescent Current - Shutdown EN = 0V 1 5 µA
IQ2 Quiescent Current - Not Switching EN = V
IQ3 Quiescent Current - Switching EN = V

V

FB

I

B-FB

V

DD

- 600kHz Maximum Duty Cycle FSEL = 0V 85 92 %

D

MAX

- 1.2MHz Maximum Duty Cycle FSEL = V

D

MAX

I

LIM

I

EN

r

DS(ON)

I

LX-LEAK

/ΔVINLine Regulation 3V < VIN < 5.5V, V

ΔV

OUT

/ΔI

ΔV

OUT

f

OSC1

f

OSC2

V

IL

V

IH

G

M

V

DD-ON

HYS V

I

SS

OTP Over-Temperature Protection 150 °C

Feedback Voltage 1.272 1.294 1.309 V
Feedback Input Bias Current 0.01 0.5 µA
Input Voltage Range 2.3 5.5 V

Current Limit - Max Peak Input Current 1.5 2.0 A
Shutdown Input Bias Current EN = 0V 0.01 0.5 µA
Switch ON-Resistance VDD = 2.7V, ILX = 1A 0.2 Ω
Switch Leakage Current VSW = 27V 0.01 3 µA

Load Regulation VIN = 3.3V , V

OUT

Switching Frequency Accuracy FSEL = 0V 500 620 740 kHz
Switching Frequency Accuracy FSEL = V
EN, FSEL Input Low Level 0.5 V
EN, FSEL Input High Level 1.5 V
Error Amp Tranconductance ΔI = 5µA 70 130 150 1µ/Ω
VDD UVLO On Threshold 2.1 2.2 2.3 V

UVLO Hysteresis 100 mV

DD

Soft-Start Charge Current 4 6 8 µA

= +25°C) Thermal Information

A

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

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

+0.3V)

DD

A

= 3.3V, V

IN

limits are 100% tested at +25°C, unless otherwise specified. Temperature limits est ablished by characterization
and are not production tested.

OUT

= 12V, I

= 0mA, FSEL = GND, TA = -40°C to +85°C; Parameters with MIN and/or MAX

OUT

DD
DD

Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +135°C

Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves

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

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

, FB = 1.3V 0.7 mA
, FB = 1.0V 3 4 mA

DD

= 12V 0.2 %

OUT

= 12V , IO = 30mA to 200mA 0.3 %

OUT

DD

85 90 %

1000 1250 1500 kHz

2

FN9261.3

May 9, 2008

Block Diagram

www.BDTIC.com/Intersil

ISL97516

EN SS

SHUTDOWN

AND START -UP

CONTROL

VDD

REFERENCE
GENERATOR

COMPARATOR

COMP

FSEL

OSCILLATOR

CURRENT

SENSE

GM

AMPLIFIER

PWM LOGIC

CONTROLLER

Pin Descriptions

PIN NUMBER PIN NAME DESCRIPTION

FET

DRIVER

LX

GND

FB

1 COMP Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground.
2 FB Voltage feedback pin. Internal reference is 1.294V nominal. Connect a resistor divider from V

V
3 EN Shutdown control pin. Pull EN low to turn off the device.
4 GND Analog and power ground.
5 LX Power switch pin. Connected to the drain of the internal power MOSFET.
6 VDD Analog power supply input pin.
7 FSEL Frequency select pin. When FSEL is set low, switching frequency is set to 620kHz. When connected to

high or V
8 SS Soft-start control pin. Connect a capacitor to control the converter start-up.

Typical Application Circuit

R

3

3.9kΩ
C

5

4.7nF

= 1.294V (1 + R1/R2). See “Typical Application Circuit” on page 3.

OUT

, switching frequency is set to 1.25MHz.

DD

SS

FSEL

VDD

LX

8

7

6

5

C

3

27nF

C

4

0.1µF

+

C

1

22µF

1

85.2kΩR
R

10kΩ

1

COMP

FB

2

2

S1

EN

3

GND

4

10µH

D

1

2.3V TO 5.5V

C

+

2

22µF

12V

OUT

.

3

FN9261.3

May 9, 2008