TPS65131-Q1 Datasheet, PDF (1/33 Pages) Texas Instruments – Positive- and Negative-Output DC-DC Converter

TPS65131-Q1
SLVSBB2D – MAY 2012 – REVISED OCTOBER 2014
TPS65131-Q1 Positive- and Negative-Output DC-DC Converter
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 2: –40°C to 105°C
Ambient Operating Temperature Range
– Electrical Characteristics Tested Over –40°C
to 125°C Junction Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C4B
• Dual Adjustable Output Voltages up to 15 V and
down to –15 V
• 2–A Typical Switch-Current Limit for Boost and
Inverter Main Switches
• High Conversion Efficiency
– Up to 91% at Positive Output Rail
– Up to 85% at Negative Output Rail
– Power-Save Mode at Low Load
• Independent Enable Inputs for Power-Up and
Power-Down Sequencing
• Control Output for External PFET to Support
Complete Supply Disconnect When Shut Down
• 2.7-V to 5.5-V Input-Voltage Range
• Minimum 1.25-MHz Fixed-Frequency PWM
Operation
• Thermal Shutdown
• Overvoltage Protection on Both Outputs
• 0.2-µA Typical Shutdown Current
• Small 4-mm × 4-mm QFN-24 Package (RGE)
2 Applications
• Small- to Medium-Size OLED Displays
• (TFT) LCD, CCD Bias Supply
3 Description
The TPS65131-Q1 device is dual-output dc-dc
converter generating a positive output voltage up to
15 V and a negative output voltage down to –15 V
with output currents of typically 200 mA, depending
on input-voltage to output-voltage ratio. With a total
efficiency up to 85%, the device is ideal for portable
battery-powered equipment. The input-voltage range
of 2.7 V to 5.5 V allows, for example, 3.3-V and 5-V
rails to power the TPS65131-Q1 device. The
TPS65131-Q1 device comes in a QFN-24 package
with thermal pad. Requiring few and small external
components, the overall solution size can be small.
The converter operates with a fixed-frequency PWM
control topology and, with power-save mode enabled,
uses a pulse-skipping mode at light load currents. In
operation, the typical overall device quiescent current
is only 500 µA. In shutdown, the device draws
typically 0.2 µA. Independent enable pins allow
power-up and power-down sequencing for both
outputs. The device has an internal current limit,
overvoltage protection, and a thermal shutdown for
highest reliability under fault conditions.
The TPS65131-Q1 device is qualified for automotive
applications, according to AEC-Q100 temperature
grade 2. The electrical characteristics are tested over
–40°C to 125°C device junction temperature. This,
combined with lowest shutdown currents, small
solution size, package with thermal pad, plus good
efficiency and protection features, targets automotive
and industrial applications.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65131-Q1
VQFN (24)
4 mm × 4 mm
(1) For all available packages, see the orderable addendum.
Application Schematic
L1
V_I
Q1
4.7 µH
D1
V_POS
C1
4.7 µF
C4
INP
BSW
VPOS
FBP
R1
22 µF
C9
VREF
C8
R2
TPS65131-Q1
R4
220 nF
R7
100 Ω
C2
4.7 µF
C3
100 nF
INN
VIN
ENP
PSP
ENN
PSN
AGND
FBN
VNEG
OUTN
CN
CP
PGND
R3
C10
V_NEG
C6 C7
10nF 4.7nF
D2
L2
4.7 µH
C5
22 µF
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.