EL7535_06 Datasheet, PDF (1/9 Pages) Intersil Corporation – Monolithic 350mA Step-Down Regulator

®
Data Sheet
July 13, 2006
EL7535
FN7003.5
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 Ld MSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART NUMBER PART TAPE &
(BRAND) MARKING REEL PACKAGE
EL7535IY
a
- 10 Ld MSOP
EL7535IY-T7 a
7” 10 Ld MSOP
EL7535IY-T13 a
13” 10 Ld MSOP
EL7535IYZ
(Note)
BAACA
- 10 Ld MSOP
(Pb-free)
EL7535IYZ-T7 BAACA
(Note)
7” 10 Ld MSOP
(Pb-free)
PKG.
DWG. #
MDP0043
MDP0043
MDP0043
MDP0043
MDP0043
EL7535IYZ-T13 BAACA
(Note)
13” 10 Ld MSOP 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.
Pinout
EL7535 (10 LD MSOP)
TOP VIEW
1 SGND
FB 10
2 PGND
VO 9
3 LX
POR 8
4 VIN
EN 7
5 VDD
RSI 6
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
Typical Application Diagram
EL7535
(10 LD MSOP)
TOP VIEW
V_S
(2.5V to 5.5V)
L₁
V_O
R₃ 100Ω
C₂
C₃
VIN
VDD
LX _1.8µH
C₁
10µF
10µF
0.1µF
EL7535
R₅ 100kΩ
R₄ 100kΩ
R₆
100kΩ
POR
EN
RSI
PGND
SGND
R₁*
124kΩ
FB
R₂*
100kΩ
C₄
470pF
VO
(1.8V @ 350mA)
* V_O = 0.8V * (1 + R₁ / R₂)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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