Datasheet

SLUU070
2
Using the TPS62102 Low-Power High-Efficiency Buck Converter Evaluation Module
1 Features
The TPS62102 Low-Power High-Efficiency Buck Converter includes:
• 2.5-V to 9-V Input Range
• 0.8-V to 8-V Output Range
• Dual Auto Mode for High Efficiency at Light Loads
• Externally Synchronizable
• 0% to 100% Duty Cycle
• BICMOS for Low Quiescient, Standby, and Shutdown Currents
• 8-Pin SOIC (D) Package
2 Description
The TPS62102EVM–01 evaluation module is supplied fully assembled and ready to test. This
evaluation module demonstrates an automatic mode switching converter that is capable of
500-mA output current at 3.3 V. The switching frequency of this converter is 1 MHz free running.
Other versions of this converter IC are available that have nominal switching frequencies of 300
kHz, 600 kHz, and 2 MHz. Note that the fundamental frequencies have been chosen to minimize
interaction with 455-kHz intermediate frequency (IF) circuits. The user needs to supply a power
source and suitable load. Figure 1 is the schematic of the evaluation module as assembled. In
this configuration, the converter should have a closed-loop bandwidth of approximately 40 kHz.
UDG–00100
1
3
2
4
8
6
7
5
VIN
SD/SYNC
MODE
GND
SW
PGND
FB
COMP
L1
15
µ
H
D1
MA786CT
C6
10
µ
F
R6
1 k
Ω
C8
100 pF
R1
30.1 k
Ω
C4
1.0 nF
R3 0
Ω
R5
113 k
Ω
R4
35.7 k
Ω
TPS62102
C2
1.0
µ
F
CB2
CB1
VOUTVIN
C1
100
µ
F
Figure 1. Evaluation Module Schematic