EL7535
®
Data Sheet
July 13, 2006
FN7003.5
Monolithic 350mA Step-Down Regulator
Features
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
• Extremely small 350mA DC/DC converter
• 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 Ld MSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Applications
• PDA and pocket PC computers
• Bar code readers
Ordering Information
PART NUMBER
(BRAND)
PART
MARKING REEL
TAPE&
PKG.
DWG. #
• Cellular phones
PACKAGE
10 Ld MSOP
10 Ld MSOP
10 Ld MSOP
• Portable test equipment
• Li-Ion battery powered devices
• Small form factor (SFP) modules
EL7535IY
a
-
7”
13”
-
MDP0043
MDP0043
MDP0043
MDP0043
EL7535IY-T7
EL7535IY-T13
a
a
EL7535IYZ
(Note)
BAACA
10 Ld MSOP
(Pb-free)
Typical Application Diagram
EL7535
(10 LD MSOP)
TOP VIEW
EL7535IYZ-T7 BAACA
(Note)
7”
10 Ld MSOP
(Pb-free)
MDP0043
MDP0043
V
V
(2.5V to 5.5V)
L
1
O
EL7535IYZ-T13 BAACA
(Note)
13”
10 Ld MSOP
(Pb-free)
S
VIN
LX
1.8µH
R
100Ω
3
C
10µF
1
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.
VDD
C
10µF
C
3
0.1µF
2
EL7535
R
R
100kΩ
5
4
R *
1
POR
124kΩ
C
4
FB
VO
EN
470pF
100kΩ
RSI
R *
2
100kΩ
Pinout
R
6
100kΩ
PGND
SGND
EL7535 (10 LD MSOP)
TOP VIEW
(1.8V @ 350mA)
SGND
PGND
LX
FB
VO
1
2
3
4
5
10
9
* V = 0.8V * (1 + R / R )
O
1
2
POR
EN
8
VIN
7
6
VDD
RSI
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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1
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