TB423 Datasheet, PDF (1/7 Pages) Intersil Corporation – The EL7562 is a Buck (Step Down) DC:DC controller with integrated synchronous MOSFETs in a 16-pin QSOP package.

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Using the EL7562 Demo Board
June 20, 2002
TB423
The EL7562 is a Buck (Step Down)
DC:DC controller with integrated
synchronous MOSFETs in a 16-pin
QSOP package. With very few external components, a 2A
step-down DC:DC converter can be very easily built,
resulting in saved board space (0.5in²), minimal design
effort, and improved design time.
There are 2 demo boards, one for nominal 5V input and
another for 3.3V input. This document outlines the design
consideration and lists the bill of materials and the layout.
Please also refer to the advanced data sheet of EL7562 for
detailed applications of the features.
EL7562 Demo Board Circuit Schematic for V_IN = 5V Application
V_O
=
0.985
×



1
+
RR_{-----21- }
C₃
C₄
R₃
C₁
C₂
V_IN
1 SGND PGND 16
2 COSC VREF 15
3 VDD
FB 14
4 PGND VDRV 13
5 PGND
LX 12
6 VIN
LX 11
7 VIN
VHI 10
8 EN
PGND 9
EL7562
C₅
R₂
R₁
L₁
C₆
V_O
C₇
EL7562 Demo Board Bill of Material V_IN = 5V, V_OUT = 3.3V
REFERENCE
DESIGNATION
VALUE
MANUFACTURER
C1
100µF
Sprague
C2, C3, C5, C6
0.1µF, 0603
Any
C4
270pF, 5%, 0603
Any
C7
100µF
Sprague
L1
4.7µH
Coilcraft
R1
1kΩ, 0603
Any
R2
2370Ω, 0603
Any
R3
39Ω, 0603
Any
MANUFACTURER’S
PHONE NUMBER
207-324-4140
207-324-4140
847-639-6400
PART NUMBER
293D107X0010D2
293D107X0010D2
D01813472HC
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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