Texas Instruments Evaluation Module for TPS54429E Synchronous Step-Down SWIFT Converter with Auto-Skip ECO Mode TPS54429 TPS54429EEVM-608 데이터 시트
제품 코드
TPS54429EEVM-608
O
R1
V
= 0.765
1+
R2
æ
ö
´ ç
÷
è
ø
O
O
R1
V
= (0.763 + 0.0017
V )
1+
R2
æ
ö
´
´ ç
÷
è
ø
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Introduction
1
Introduction
The TPS54429E is a single, adaptive on-time D-CAP2™ mode synchronous buck converter requiring a
very low external component count. The D-CAP2™ control circuit is optimized for low-ESR output
capacitors such as POSCAP, SP-CAP or ceramic types and features fast transient response with no
external compensation. The switching frequency is internally set at a nominal 700 kHz. The high-side and
low-side switching MOSFETs are incorporated inside the TPS54429E package along with the gate drive
circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS54429E to achieve high
efficiencies and helps keep the junction temperature low at high output currents. The TPS54429E also has
an auto-skip Eco-mode™ to enable higher efficiency at light loads. The TPS54429E dc/dc synchronous
converter is designed to provide up to a 4.5-A output from an input voltage source of 7 V to 18 V. The
output voltage range is from 0.76-V to 5.5-V voltage and output current range for the evaluation module
are given in
very low external component count. The D-CAP2™ control circuit is optimized for low-ESR output
capacitors such as POSCAP, SP-CAP or ceramic types and features fast transient response with no
external compensation. The switching frequency is internally set at a nominal 700 kHz. The high-side and
low-side switching MOSFETs are incorporated inside the TPS54429E package along with the gate drive
circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS54429E to achieve high
efficiencies and helps keep the junction temperature low at high output currents. The TPS54429E also has
an auto-skip Eco-mode™ to enable higher efficiency at light loads. The TPS54429E dc/dc synchronous
converter is designed to provide up to a 4.5-A output from an input voltage source of 7 V to 18 V. The
output voltage range is from 0.76-V to 5.5-V voltage and output current range for the evaluation module
are given in
Table 1. Input Voltage and Output Current Summary
EVM
Input Voltage Range
Output Voltage and Current Range
TPS54429EEVM-608
VIN = 7 V to 18 V
VOUT = 1.05 V, 0 A to 4.5 A
2
Performance Specification Summary
A summary of the TPS54429EEVM-608 performance specifications is provided in
. Specifications
are given for an input voltage of VIN = 12 V and an output voltage of 1.05 V, unless otherwise noted. The
ambient temperature is 25°C for all measurement, unless otherwise noted.
ambient temperature is 25°C for all measurement, unless otherwise noted.
Table 2. TPS54429E EVM and Performance Specifications Summary
Specifications
Test Conditions
Min
Typ
Max
Unit
Input voltage range (VIN)
7
12
18
V
Output voltage
1.05
V
Operating frequency
VIN = 12 V, I
O
= 1 A
700
kHz
CH1
Output current range
0
4.5
A
Overcurrent limit
VIN = 12 V, L
O
= 1.5 µH
5.9
A
Output ripple voltage
VIN = 12 V, I
O
= 4 A
10
mV
PP
3
Modifications
These evaluation modules are designed to provide access to the feature of the TPS54429E. Some
modification can be made to this module.
modification can be made to this module.
3.1
Output Voltage Setpoint
To change the output voltage of the EVMs, it is necessary to change the value of resistor R1. Changing
the value of R1 can change the output voltage above 0.765 V. The value of R1 for a specific output
voltage can be calculated using
the value of R1 can change the output voltage above 0.765 V. The value of R1 for a specific output
voltage can be calculated using
and
For output voltage from 0.76 V to 2.5 V:
(1)
For output voltage over 2.5 V:
(2)
3
SLVU444 – March 2011
TPS54429EEVM-608, 4.5-A, SWIFT™ Regulator— Evaluation Module
© 2011, Texas Instruments Incorporated