ISL97536_07 Datasheet, PDF (1/8 Pages) Intersil Corporation – Monolithic 1A Step-Down Regulator with Low Quiescent Current

®
Data Sheet
November 2, 2007
ISL97536
FN6279.1
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 0.15in² 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.
Ordering Information
Features
• Less than 0.15in² 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
PART
NUMBER
(Note)
ISL97536IUZ
PART
MARKING
PACKAGE
(Pb-Free)
7536Z
10 Ld MSOP
PKG. DWG.
#
MDP0043
• Portable test equipment
• Li-ion battery powered devices
• Small form factor (SFP) modules
ISL97536IUZ-TK* 7536Z
ISL97536IUZ-T*
7536Z
10 Ld MSOP MDP0043
Tape and Reel
10 Ld MSOP MDP0043
Tape and Reel
Pinout and Typical Application Diagram
ISL97536
(10 LD MSOP)
TOP VIEW
*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.
C₁
10µF
V_O (1.8V@600mA)
V_S (2.5V-6V)
L₁
C₂
10µF
1.8µH
R₃
100Ω
C₃
0.1µF
1 SGND
2 PGND
3 LX
4 VIN
5 VDD
FB 10
VO 9
POR 8
EN 7
RSI 6
R_{4 100kΩ}
R₂*
100kΩ
R₁*
C₄
124kΩ
470pF
POR
EN
RSI
R₆
100kΩ
R_{5 100kΩ}
* V_O = 0.8V * (1 + R₁/R₂)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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