TPS63710 Datasheet, PDF (1/36 Pages) Texas Instruments – Low Noise Synchronous Inverting Buck Converter

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TPS63710
SLVSD44 – SEPTEMBER 2017
TPS63710 Low Noise Synchronous Inverting Buck Converter
1 Features
•1 3.1 V to 14 V Input Voltage Range
• 1 A Output Current
• ±1.5% Output Voltage Accuracy
• Synchronous Rectification
• Low 1/f-Noise Reference System
• Output Voltage: -1 V to -5.5 V
• |V_OUT| < 0.7 x V_IN
• Up to 91% Efficiency
• 1.5-MHz fixed frequency PWM mode
• Thermal Shutdown
• 5-μA Shutdown Current
• 3-mm × 3-mm WSON Package
• Create a Custom Design Using the TPS63710
With the WEBENCH^® Power Designer
2 Applications
• Generic Negative Voltage Supply
• ADC and DAC Supply in Telecom Systems
• Bias for GaN transistors
• Optical Module Laser Diode Bias
• Noise Sensitive and Space Limited Applications
Requiring a Negative Supply Voltage
V_IN
C_IN
C_CAP
C_AUX
Typical Application
TPS63710
VIN
CP
C_CP
L
SW
EN
VOUT
V_OUT
C_OUT
CAP
VAUX
VREF
R₁
FB
+V
R₂
R₃
PG
GND
Copyright © 2017, Texas Instruments Incorporated
3 Description
The TPS63710 is an inverting step-down dc-dc
converter generating a negative output voltage down
to -5.5 V. It provides an output current up to 1 A,
depending on the input-voltage to output-voltage
ratio. Its filtered reference system gives low 1/f noise
which is required in high performance
telecommunication systems.
The TPS63710 operates with a fixed-frequency PWM
control topology. It has an internal current limit and a
thermal shutdown. The input voltage range of 3.1 V to
14 V allows the TPS63710 to be used in a variety of
applications where a negative output voltage is
generated from a, in absolute value, higher positive
input voltage.
Synchronous rectification provides high efficiency
especially for small output voltages like -1.8 V, which
are typically used as a negative supply voltage for
high performance DACs and ADCs. A fixed switching
frequency of 1.5 MHz allows the use of small external
components and enables a small total solution size.
The TPS63710 comes in a 3-mm × 3-mm WSON
package that provides good thermal performance in
applications running at high ambient temperature.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS63710
WSON
3 mm x 3 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs output current for V_OUT = -1.8V
100
90
80
70
60
50
40
VIN = 4.5 V
30
VIN = 5 V
VIN = 7 V
20
VIN = 9 V
10
VIN = 12 V
VIN = 14 V
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output Current (A)
D004
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.