1
®
FN7396.8
EL7536
Monolithic 1A Step-Down Regulator
The EL7536 is a synchronous, integrated FET 1A step-down
regulator with internal compensation. It operates with an
input voltage range from 2.5V to 5.5V, 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 EL7536 features PWM mode control. The operating
frequency is typically 1.4MHz. Additional features include a
100ms Power-On-Reset output, <1µA shut-down current,
short-circuit protection, and over-temperature protection.
The EL7536 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. Both packages are
specified for operation over the full -40°C to +85°C
temperature range.
Pinout
EL7536 (10 LD MSOP)
TOP VIEW
Features
• Less than 0.15in
2
(0.97cm
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 94% efficiency
• <1µA shut-down current
• Overcurrent and over-temperature protection
• Pb-free plus anneal 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
EL7536
TOP VIEW
Ordering Information
PART NUMBER
(BRAND)
PART
MARKING
TAPE &
REEL PACKAGE
PKG.
DWG. #
EL7536IY BDAAA - 10 Ld MSOP MDP0043
EL7536IY-T7 BDAAA 7” 10 Ld MSOP MDP0043
EL7536IY-T13 BDAAA 13” 10 Ld MSOP MDP0043
EL7536IYZ
(Note)
BFAAA - 10 Ld MSOP
(Pb-free)
MDP0043
EL7536IYZ-T7
(Note)
BFAAA 7” 10 Ld MSOP
(Pb-free)
MDP0043
EL7536IYZ-T13
(Note)
BFAAA 13” 10 Ld MSOP
(Pb-free)
MDP0043
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin 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.
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 @ 1A)
R
1
*
R
2
*
124kΩ
100kΩ
VIN
VDD
LX
FB
RSI
EN
POR
PGND
SGND
R
4
100kΩ
R
5
100kΩ
100kΩ
R
6
EL7536
VO
V
O
R
3
100Ω
470pF
C
4
Data Sheet
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. 2003-2006. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
July 13, 2006
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