1
FN7003.7
EL7535
Monolithic 350mA Step-Down Regulator
The EL7535 is a synchronous, integrated FET 350mA
step-down regulator in a 10 Ld MSOP package. The regulator
is internally compensated, which makes it possible to use just
five tiny external components to form a complete DC/DC
converter. The regulator 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 EL7535 features PWM mode control. The operating
frequency is typically 1.4MHz. Additional features include
<1µA shut-down current, short-circuit protection, and
over-temperature protection.
The EL7535 is available in the 10 Ld MSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Pinout
EL7535
(10 LD MSOP)
TOP VIEW
Features
• Extremely Small 350mA DC/DC Converter
• Max Height 1.1mm 10 Ld MSOP Package
• Possibly Uses Only Five Tiny External Components with
Fixed Output
• Power-On-Reset Output (POR)
• Internally-Compensated Voltage Mode Controller
• Up to 94% Efficiency
• <1µA Shut-Down Current
• Overcurrent and Over-Temperature Protection
• Pb-free Available (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
Typical Application Diagram
Ordering Information
PART
NUMBER
PART
MARKING PACKAGE
PKG.
DWG. #
EL7535IYZ*
(Note)
BAACA 10 Ld MSOP
(Pb-free)
MDP0043
*Add “-T7” or “-T13” suffix for tape and reel. 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.
SGND FB
VDD RSI
VIN EN
LX POR
PGND VO
1
2
3
4
10
9
8
7
5 6
*V
O
= 0.8V*(1 + R
1
/R
2
)
1.8µH
C
1
C
2
10µF
L
1
0.1µF
C
3
(2.5V TO 5.5V)
V
S
10µF
(1.8V @ 350mA)
R
1
*
R
2
*
124k
100k
VIN
VDD
LX
FB
RSI
EN
POR
PGND
SGND
R
4
100k
R
5
100k
100k
R
6
EL7535
VO
V
O
R
3
100
470pF
C
4
Data Sheet December 9, 2015
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 trademark of Intersil Americas LLC.
Copyright Intersil Americas LLC. 2004-2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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