EL7535
®
Data Sheet
August 16, 2005
FN7003.2
Monolithic 350mA Step-Down Regulator
Features
• Extremely small 350mA DC/DC converter
The EL7535 is a synchronous, integrated FET 350mA step-
down regulator in a MSOP10 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
• Max height 1.1mm MSOP10 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
externally set from 0.8V to V with a resistive divider.
IN
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.
• <1µA shut-down current
• Overcurrent and over-temperature protection
• Pb-Free plus anneal available (RoHS compliant)
The EL7535 is available in the 10-pin MSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Applications
• PDA and pocket PC computers
Ordering Information
• Bar code readers
PART NUMBER
TAPE &
REEL
PKG.
• Cellular phones
(BRAND)
PACKAGE
DWG. #
• Portable test equipment
• Li-Ion battery powered devices
• Small form factor (SFP) modules
EL7535IY
10-Pin MSOP
-
MDP0043
MDP0043
MDP0043
MDP0043
MDP0043
MDP0043
(a)
EL7535IY-T7
(a)
10-Pin MSOP
10-Pin MSOP
7”
Pinout and Typical Application Diagram
EL7535IY-T13
(a)
13”
-
EL7535
(10-PIN MSOP)
TOP VIEW
EL7535IYZ
(BAACA) (Note)
10-Pin MSOP
(Pb-free)
EL7535IYZ-T7
(BAACA) (Note)
10-Pin MSOP
(Pb-free)
7”
EL7535IYZ-T13
(BAACA) (Note)
10-Pin MSOP
(Pb-free)
13”
R *
1
100kΩ
1 SGND
2 PGND
3 LX
FB 10
R *
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.
2
124kΩ
VO
POR
EN
9
8
7
6
C
10µF
C
2
10µF
1.8µH
1
L
1
POR
EN
V
(1.8V@350mA)
O
4 VIN
V
(2.5V-6V)
IN
5 VDD
RSI
RSI
R
6
100kΩ
R
R
100kΩ
100kΩ
4
5
* FOR VARIABLE OUTPUT VOLTAGE: V = 0.8V * (1 + R / R )
O
2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved
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