intersil ISL98012 DATA SHEET

®

ISL98012

Data Sheet October 15, 2008

1.8V Input PWM Step-Up Regulator

The ISL98012 is a high frequency, high efficiency step-up
DC/DC regulator operated in fixed frequency PWM mode.
With an integrated 1.4A MOSFET , it can deliver up to 600mA
output current at up to 92% efficiency. The adjustable
switching frequency is up to 750kHz, making it ideal for
common boost applications.

When shut down, it draws <1µA of current. This feature,
along with the minimum starting voltage of 1.8V, makes it
suitable for portable equipment powered by 1 Lithium Ion, 3
to 4 NiMH cells, or 2 cells of alkaline battery.

The ISL98012 is available in a 10 Ld MSOP package, with a
maximum height of 1.1mm. With proper external
components, the whole converter takes less than 0.25in

2

PCB space.
This device is specified for operation over the full -40°C to

+85°C temperature range.

Pinout

ISL98012

(10 LD MSOP)

TOP VIEW

PGND

1

SGND

2

RT

3

EN

4

5 6

LX

10

VDD

9

FB

8

SS

7

LBOLBI

FN6654.0

Features

• Up to 92% Efficiency

• Up to 600mA I

•4.5V < V

•1.8V < V

< 17V

OUT

< 13.2V

IN

OUT

• Up to 750kHz Adjustable Frequency

• <1µA Shutdown Current

• Adjustable Soft-Start

• Low Battery Detection

• Internal Thermal Protection

• 1.1mm Max Height 10 Ld MSOP Package

• Pb-Free (RoHS compliant)

Applications

• 1.8V to 15V Converters - OLED

• 5V to 12V Converters

• 3V to 5V and 3V to 12V Converters

•TFT-LCD

• Portable Equipment

Ordering Information

PART NUMBER

(Note)

ISL98012IUZ 98012 10 Ld MSOP MDP0043

PART

MARKING

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL98012IUZ-T* 98012 10 Ld MSOP MDP0043

ISL98012IUZ-TK* 98012 10 Ld MSOP MDP0043

*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination
finish, which is 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.

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.

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

Copyright Intersil Americas Inc. 2008. All Rights Reserved

Typical Application

V

(1.8V TO 9V)

IN

1.8V TO 12V

EN

C

10µF

1

R

3

56kΩ

ISL98012

L

1

10µH

1

PGND

SGND

2

RT

3

EN

4

LBI

5 6

LX

VDD

FB

SS

LBO

D

1

R

4

5k

10

9

8

C

3

7

20nF

C

4

0.1µF

C

5

22µF

R

2

113kΩ
R

1

10kΩ 4.7nF

C

V

OUT

(15V UP TO
200mA)

10

2

FN6654.0

October 15, 2008

ISL98012

Absolute Maximum Ratings (T

FB, SS, RT, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, 6.5V

LX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +18V

VDD, EN, LBI, LBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +12V

= +25°C) Thermal Information

A

Thermal Resistance (Typical, Note 1) θ

10 Lead MSOP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

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

(°C/W)

JA

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

Maximum Operating Conditions

Maximum Operating Frequency. . . . . . . . . . . . . . . . . . . . . . .750kHz

Minimum Operating Frequency . . . . . . . . . . . . . . . . . . . . . . .380kHz

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.

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

Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below

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

NOTE:

is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

1. θ

JA

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

.

Electrical Specifications V

IN

= 5V, V

= TC = T

J

= 12V, L = 10µH, I

OUT

A

= 0mA, RT = 56kΩ, TA = +25°C, Unless Otherwise Specified.

OUT

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

V
V

IN
OUT

Input Voltage Range R4 must ensure VDD ≤ 12V 1.8 13.2 V

Output Voltage Range Note 2 4.5 17 V
IQ1 Quiescent Current - Shut-down VEN = 0, feedback resistors disconnected 1 µA
IQ2 Quiescent Current V
V

FB

I

FB

D

MAX

I

LIM

I

EN

V

LBI

V

OL-LBO

I

LEAK-LBO

R

DS(ON)

I

LEAK-SWITCH

ΔV

/ΔVIN/V

OUT

ΔV

OUT/VOUT

I

Soft Start Current 0 < VSS< 0.1V 12 µA

SS

V

RT

f

OSC1

Feedback Voltage 1.29 1.33 1.37 V

Feedback Input Bias Current 0 < V

Maximum Duty Cycle 89.5 92 %

Current Limit - Max Peak Input Current 1 1.4 A

Enable Input Bias Current 1µA

LBI Threshold Voltage 180 220 250 mV

LBO Output Low I

LBO Output Leakage Current V

Switch On Resistance At 12V output 220 mΩ

Switch Leakage Current LX = 18V 1 µA

Line Regulation 3V < V

OUT

Load Regulation I

Voltage at RT for Bias Current RT = 56kΩ 1.34 V

Switching Frequency RT = 56kΩ 600 670 750 kHz

= 2V, Continuous operation 1.4 2 mA

EN

< 1.5V 0.10 µA

FB

= 1mA 0.1 0.2 V

LBO

= 250mV, V

LBI

< 6V, V

IN

= 50mA to 150mA 1 %

OUT

= 5V 0.02 2 µA

LBO

= 12V, no load 0.4 %/V

OUT

VHI_EN EN Input High Threshold 1.6 V
VLO_EN EN Input Low Threshold 0.5 V

NOTE:

2. Minimum V

of 4.5V is tested with V

OUT

IN

= 1.8V.

3

FN6654.0

October 15, 2008