EL7532 Datasheet, PDF (1/8 Pages) Intersil Corporation – Monolithic 2A Step-Down Regulator

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November 2, 2007
EL7532
FN7435.8
Monolithic 2A Step-Down Regulator
The EL7532 is a synchronous, integrated FET 2A 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 single Li-Ion battery source. The
output can be externally set from 0.8V to V_IN with a resistive
divider.
The EL7532 features PWM mode control. The operating
frequency is typically 1.5MHz. Additional features include a
100ms Power-On-Reset output, <1µA shut-down current
and over-temperature protection.
The EL7532 is available in the 10-pin MSOP package,
making the entire converter occupy less than 0.18 in² of
PCB area with components on one side only. The package is
specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART
TEMP.
PKG.
PART NUMBER MARKING RANGE (°C) PACKAGE DWG. #
EL7532IY
BABAA -40 to +85 10 Ld MSOP MDP0043
EL7532IYZ
(Note)
BAARA
-40 to +85 10 Ld MSOP MDP0043
(Pb-free)
*Add -T7 and -T13 for tape and reel. Please refer to TB347 for details
on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach materials
and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which
is 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
EL7532
(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
• 2A continuous current (from -40°C to +85°C)
• Less than 0.18 in² footprint for the complete 2A converter
• Max height 1.1mm MSOP10
• 1.5MHz (typ.) switching frequency
• 100ms Power-On-Reset output (POR)
• Internally-compensated voltage mode controller
• Up to 94% efficiency
• <1µA shut-down current
• Over-temperature protection
• Pb-free available (RoHS compliant)
Applications
• PDA and pocket PC computers
• Bar code readers
• ADSL modems
• Portable instruments
• Li-Ion battery powered devices
• ASIC/FPGA/DSP supplies
• Set top boxes
Typical Application Schematic
V_S
(2.5V to 5.5V)
L₁
V_O
R₃ 100Ω
VIN
VDD
LX _1.8µH
C₁
10µF
C₂
C₃
10µF
0.1µF
EL7532
R₅ 100kΩ
R₄ 100kΩ
R₆
100kΩ
POR
EN
RSI
PGND
SGND
R₁*
124kΩ
FB
R₂*
100kΩ
C₄
470pF
VO
(1.8V @ 2A)
V_O = 0.8V * (1 + R₂ / R₁)
*C4 is optional. Make sure that loop response are
measured in actual application.
SIGNAL
GROUND
POWER
GROUND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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