EL7535 Datasheet, PDF (1/8 Pages) Intersil Corporation – Monolithic 350mA Step-Down Regulator

®
Data Sheet
August 16, 2005
EL7535
FN7003.2
Monolithic 350mA Step-Down Regulator
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
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-pin MSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART NUMBER
(BRAND)
PACKAGE
TAPE & PKG.
REEL DWG. #
EL7535IY
(a)
10-Pin MSOP
-
MDP0043
EL7535IY-T7
(a)
10-Pin MSOP
7”
MDP0043
EL7535IY-T13
(a)
10-Pin MSOP
13”
MDP0043
EL7535IYZ
(BAACA) (Note)
10-Pin MSOP
-
MDP0043
(Pb-free)
EL7535IYZ-T7
(BAACA) (Note)
10-Pin MSOP
7”
MDP0043
(Pb-free)
EL7535IYZ-T13
(BAACA) (Note)
10-Pin MSOP
13”
MDP0043
(Pb-free)
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.
Features
• 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
• <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
Pinout and Typical Application Diagram
EL7535
(10-PIN MSOP)
TOP VIEW
C₁
10µF
V_O (1.8V@350mA)
L₁
C₂
10µF
1.8µH
V_IN (2.5V-6V)
1 SGND
2 PGND
3 LX
4 VIN
5 VDD
FB 10
VO 9
POR 8
EN 7
RSI 6
R₄ 100kΩ
R₅ 100kΩ
R₁*
100kΩ
R₂*
124kΩ
POR
EN
RSI
R₆
100kΩ
* FOR VARIABLE OUTPUT VOLTAGE: V_O = 0.8V * (1 + R₂ / R₁)
1
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. 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.