TPS548D21 Datasheet, PDF (1/45 Pages) Texas Instruments – 1.5-V to 16-V VIN, 4.5-V to 22-V VDD, 40-A SWIFT Synchronous Step-Down Converter Supporting AVSO and Full Differential Sense

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TPS548D21
SLUSCI8 – JULY 2016
TPS548D21 1.5-V to 16-V V_IN, 4.5-V to 22-V V_DD, 40-A SWIFT™
Synchronous Step-Down Converter Supporting AVSO and Full Differential Sense
1 Features
•1 Conversion Input Voltage Range (PV_IN): 1.5 V to
16 V
• Input Bias Voltage (V_DD) Range: 4.5 V to 22 V
• Output Voltage Range: 0.6 V to 5.5 V
• Integrated, 2.9-mΩ and 1.2-mΩ Power MOSFETs
with 40-A Continuous Output Current
• Voltage Reference 0.6 V to 1.2 V in 50 mV Steps
Using VSEL Pin
• ±0.5%, 0.9-V_REF Tolerance Range: –40°C to
125°C Junction Temperature
• True Differential Remote Sense Amplifier
• D-CAP3™ Control Loop to Support Large Bulk
Capacitors and/or Small MLCCs Without External
Compensation
• Analog AVS Optimization via REFIN_TRK Pin
• Adaptive On-Time Control with 4 Selectable
Frequency Settings: 425 kHz, 650 kHz, 875 kHz,
and 1.05 MHz
• Temperature Compensated and Programmable
Current Limit with R_ILIM and OC Clamp
• Choice of Hiccup or Latch-Off OVP or UVP
• VDD UVLO External Adjustment by Precision EN
Hysteresis
• Prebias Startup Support
• FCCM Mode During All Operation
• Full Suite of Fault Protection and PGOOD
• 5 mm × 7 mm × 1.5 mm, 40-Pin, Stack Clipped
LQFN-CLIP Package
2 Applications
• Enterprise Storage, SSD, NAS
• Wireless and Wired Communication Infrastructure
• Industrial PCs, Automation, ATE, PLC, Video
Surveillance
• Enterprise Server, Switches, Routers
• ASIC, SoC, FPGA, DSP Core and I/O Rails
3 Description
The TPS548D21 device is a compact single buck
converter with adaptive on-time, D-CAP3 mode
control. It is designed for high accuracy, high
efficiency, fast transient response, ease-of-use, low
external component count and space-conscious
power systems.
This device features full differential sense, TI
integrated FETs with a high-side on-resistance of
2.9 mΩ and a low-side on-resistance of 1.2 mΩ. The
device also features accurate 0.5%, 0.9-V reference
with an ambient temperature range between –40°C
and 125°C. Competitive features include: very low
external component count, accurate load regulation
and line regulation, FCCM mode operation, and
internal soft-start control.
The TPS548D21 device is available in 5 mm x 7 mm,
40-pin, LQFN-CLIP (RVF) package (RoHs exempt).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS548D21
QFN (40)
5.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application
PGOOD
EXT. SOURCE
ENABLE
VSEL
MODE
PGOOD
ILIM
RSN
REFIN_TRK
RSP
VOSNS
TPS548D21
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PVIN
Load
+±
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.