Datasheet
1.2 Reference Information
1.3 Performance Specification Summary
1.4 Modifications
1.4.1 Output Voltage Setpoint
Introduction
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inside the TPS5430 package along with the gate drive circuitry. The low drain-to-source on resistance of
the MOSFET helps the TPS5430 to achieve high efficiencies and keep the junction temperature low at
high output currents. The compensation components are internal to the integrated circuit (IC), whereas an
external divider permits an adjustable output voltage. Additionally, the TPS5430 provides an enable input.
The absolute maximum input voltage is 24 V.
Table 1. Input Voltage and Output Current Summary
EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE
TPS5430EVM-342 VIN = 10.8 V to 19.8 V 0 A to 2.25 A
• Using a buck converter in an inverting buck-boost topology (SLYT283 ) technical brief.
• Using the TPS5430 As An Inverting Buck Boost Converter (SLVA257 ) application report.
• 3-A, WIDE INPUT RANGE, STEP-DOWN SWIFT™ CONVERTER (SLVS632 ) data sheet for the
TPS5430 and TPS5431.
Table 2 provides a summary of the TPS5430EVM-342 performance specifications . Specifications are
given for an input voltage of V
IN
= 12 V and an output voltage of –5 V, unless otherwise specified. The
TPS5430EVM-342 is designed and tested for V
IN
= 10.8 = V to 19.8 = V. The ambient temperature is
25 ° C for all measurements, unless otherwise noted. Maximum input voltage for the TPS5430EVM-342 is
24 = V.
Table 2. TPS5430EVM-342 Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
VIN voltage range 10.8 12 or 15 19.8 V
Output voltage set point -5.0 V
Output current range V
IN
= 15 V 0 2.25 A
Load regulation V
IN
= 3.3 V, I
O
= 0 A to 3 A ± 0.02%
Load transient response Voltage change I
O
= 0.75 A to 2.25 A -50 mV
Recovery time 120 ms
Voltage change I
O
= 2.25 A to 0.75 A +50 mV
Recovery time 120 ms
Loop bandwidth V
IN
= 12 V, I
O
= 2 A 11.21 kHz
Phase margin V
IN
= 12V, I
O
= 2 A 73 °
Output ripple voltage V
IN
= 12V, I
O
= 2 A 100 mVpp
Output rise time 8 ms
Operating frequency 500 kHz
Max efficiency V
IN
= 11 V, V
O
= -5 V, I
O
= 0.8 A 87%
The TPS5430EVM-342 is designed to demonstrate the TPS5430 configured as an inverting buck-boost
converter. A few changes can be made to this module.
To change the output voltage of the EVM, it is necessary to change the value of resistor R3. Changing the
value of R3 can change the output voltage below about –1.25 V. The value of R3 for a specific output
voltage can be calculated using Equation 1 .
2 TPS5430EVM-342 2.25-A, Inverting Buck-Boost Regulator Evaluation Module SLVU243 – May 2008
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