TPS53127_15 Datasheet, PDF (1/30 Pages) Texas Instruments – TPS53127 Dual Synchronous Step-Down Controller For Low Voltage Power Rails

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TPS53127
SLVSA93A – MARCH 2010 – REVISED AUGUST 2014
TPS53127 Dual Synchronous Step-Down Controller
For Low Voltage Power Rails
1 Features
•1 D-CAP2™ Mode Control
– Fast Transient Response
– No External Parts Required for Loop
Compensation
– Compatible With Ceramic Output Capacitors
• High Initial Reference Accuracy (±1%)
• Low Output Ripple
• Wide Input Voltage Range: 4.5 V to 24 V
• Output Voltage Range: 0.76 V to 5.5 V
• Low-Side R_DS(ON) Loss-Less Current Sensing
• Adaptive Gate Drivers with Integrated Boost Diode
• Adjustable Soft Start
• Non-Sinking Pre-Biased Soft Start
• 700-kHz Switching Frequency
• Cycle-by-Cycle Over-Current Limiting Control
• 30-mV to 300-mV OCP Threshold Voltage
• Thermally Compensated OCP by 4000 ppm/°C at
I_TRIP
2 Applications
• Point-of-Load Regulation in Low Power Systems
for Wide Range of Applications
– Digital TV Power Supply
– Networking Home Pin
– Digital Set-Top Box (STB)
– DVD Player/Recorder
– Gaming Consoles
3 Description
The TPS53127 is a dual, adaptive on-time D-CAP2™
mode synchronous buck controller. The part enables
system designers to cost effectively complete the
suite of various end equipment's power bus
regulators with a low external component count and
low standby consumption. The main control loop for
the TPS53127 uses the D-CAP2™ Mode topology
which provides a very fast transient response with no
external component.
The TPS53127 also has a proprietary circuit that
enables the device to adapt not only low equivalent
series resistance (ESR) output capacitors such as
POSCAP/SP-CAP, but also ceramic capacitor. The
part provides a convenient and efficient operation
with conversion voltages from 4.5 V to 24 V and
output voltage from 0.76 V to 5.5 V.
The TPS53127 is available in the 24 pin RGE/PW
package, and is specified from –40°C to 85°C
ambient temperature range.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE (NOM)
TPS53127
TSSOP (24)
VQFN (24)
7.80mm x 4.40mm
4.00mm x 4.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet
4 Simplified Schematic
Input Voltage
4.5V to 24V
C9
10uF
PGND
R4
3.63kΩ
R5
10kΩ
C10
4700pF
R2
10kΩ
SGND
R1
13.5kΩ
65 4 3 21
VO2
1.05V/4A
C6
10uF
Q3
FDS8878
L2
SPM6530T
1.5uH
Q4
FDS8690
C5
0.1uF
7 EN2
8 VBST2
9 DRVH2
10 SW2
11 DRVL2
12 PGND2
Power PAD
TPS53127 RGE
(QFN )
EN1 24
VBST1 23
DRVH1 22
SW1 21
DRVL1 20
PGND1 19
C4
22uFx2
PGND
13 14 15 16 17 18
R6
4.7kΩ
C８
C7
R３
1uF
4.7uF
4.3kΩ
C11
4700pF
PGND
SGND
C2
0.1uF
Q1
FDS8878
L1
SPM6530T
1.5uH
L1
Q2
FDS8690
C3
10uF
VO1
1.8V/4A
PGND
C1
22uFx2
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.