1
®
FN6279.1
ISL97536
Monolithic 1A Step-Down Regulator with
Low Quiescent Current
The ISL97536 is a synchronous, integrated FET 1A
step-down regulator with internal compensation. It operates
with an input voltage range from 2.5V to 6V, which
accommodates supplies of 3.3V, 5V, or a Li-ion battery
source. The output can be externally set from 0.8V to V
IN
with a resistive divider.
The ISL97536 features PWM control with a 1.4MHz typical
switching frequency. The typical no load quiescent current is
only 500µA. Additional features include a 100ms Power-On-
Reset output, <1µA shutdown current, short-circuit
protection, and over-temperature protection.
The ISL97536 is available in the 10 Ld MSOP package,
making the entire converter occupy less than 0.15in
2
of PCB
area with components on one side only. The 10 Ld MSOP
package is specified for operation over the full -40°C to
+85°C temperature range.
Features
• Less than 0.15in
2
footprint for the complete 1A converter
• Components on one side of PCB
• Max height 1.1mm MSOP10
• 100ms Power-On-Reset output (POR)
• Internally-compensated voltage mode controller
• Up to 95% efficiency
• <1µA shutdown current
• 500µA quiescent current
• Hiccup mode overcurrent and over-temperature protection
• Pb-free (RoHS compliant)
Applications
• PDA and pocket PC computers
• Bar code readers
• Cellular phones
• Portable test equipment
• Li-ion battery powered devices
• Small form factor (SFP) modules
Pinout and Typical Application Diagram
ISL97536
(10 LD MSOP)
TOP VIEW
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-Free)
PKG. DWG.
#
ISL97536IUZ 7536Z 10 Ld MSOP MDP0043
ISL97536IUZ-TK* 7536Z 10 Ld MSOP
Tape and Reel
MDP0043
ISL97536IUZ-T* 7536Z 10 Ld MSOP
Tape and Reel
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.
* V
O
= 0.8V * (1 + R
1
/R
2
)
1
2
3
4
10
9
8
7
5 6
SGND FB
VDD RSI
VIN EN
LX POR
PGND VO
1.8µH
V
O
(1.8V@600mA)
C
1
POR
R
1
*
R
2
*
124kΩ
100kΩ
EN
RSI
100kΩ
C
2
V
S
(2.5V-6V)
100kΩ
R
4
R
5
10µF 10µF
L
1
R
6
100kΩ
0.1µF
R
3
100Ω
C
3
C
4
470pF
Data Sheet November 2, 2007
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.