TPS56A37RPAR

Part: TPS56A37 (TPS56A37RPAR) — Texas Instruments

Type: Synchronous Buck Converter

Description: 4.5–28 V input, 10 A synchronous buck converter with integrated 19.4 mΩ / 8.5 mΩ MOSFETs, D-CAP3 control and fixed 500 kHz switching frequency in a 3.0 mm × 3.0 mm HotRod QFN package.

Operating Conditions:

• Supply voltage (VIN): 4.5–28 V
• Operating junction temperature: -40 to 150 °C
• Output voltage range: 0.6–13 V
• Switching frequency: 500 kHz (fixed)

Absolute Maximum Ratings:

• Max VIN voltage: 32 V
• SW voltage: -2 to 32 V (-5 to 35 V for <10 ns transient)
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Feedback voltage VFB: 0.6 V typ; 0.594–0.606 V at TJ = 25 °C; 0.591–0.609 V over TJ = -40 to 150 °C
• Quiescent current (operating, non-switching, TJ = 25 °C): 45 μA typ
• Shutdown supply current (VEN = 0 V, TJ = 25 °C): 3 μA typ
• High-side RDS(on): 19.4 mΩ typ; low-side RDS(on): 8.5 mΩ typ (TJ = 25 °C)
• Low-side valley current limit: 10 / 12 / 13.8 A (min/typ/max)
• High-side peak current limit: 12.75 / 15 / 17.25 A (min/typ/max)
• VIN UVLO wake-up: 4.0 / 4.2 / 4.4 V (min/typ/max); shutdown 3.5 / 3.65 / 3.8 V
• Switching frequency: 500 kHz (VIN = 24 V, VOUT = 5 V, continuous mode)
• Soft-start: 1.8 ms default with SS pin floating
• Thermal resistance RθJA: 68.1 °C/W (JEDEC); 30 °C/W effective (4-layer TI EVM)

Features:

• D-CAP3 control mode for fast transient response with no external compensation
• Eco-mode (auto-skip) for high light-load efficiency
• Adjustable soft-start via SS capacitor
• Cycle-by-cycle overcurrent limit
• Non-latched UV, OV, OT and UVLO protections
• Power-good indicator
• Built-in output discharge function (200 Ω typ)
• Up to 98% duty cycle operation
• Pin-to-pin compatible with 6 A TPS56637 and 8 A TPS56837

Applications:

• Industrial PC, EPOS, factory automation and control
• Multifunction printers, video conference systems
• Monitors, TV, speakers, PCs and notebooks, portable electronics
• General-purpose 12 V, 19 V, 24 V power-bus supplies

Package:

• RPA, VQFN-HR, 10-pin, 3.00 mm × 3.00 mm

• 4.5V to 28V input voltage range
• 0.6V to 13V output voltage range
• Supports 10A continuous output current
• Integrated 19.4mΩ and 8.5mΩ MOSFETs
• 0.6V ±1% reference voltage at 25°C
• 45μA low quiescent current
• D-CAP3 ™ control mode for fast transient response
• Eco-mode (auto-skip mode) for high light-load efficiency
• Fixed 500kHz switching frequency
• Cycle by cycle over current limit
• Adjustable soft-start time with default 1.8ms
• Built-in output discharge function
• Power-good indicator to monitor output voltage
• Supports up to 98% duty operation
• Non-latched protections for UV, OV, OT, and UVLO
• -40°C to +150°C operating junction temperature
• Small 10-pin 3.0mm × 3.0mm HotRod ™ QFN package
• Pin-to-pin compatible with 6A TPS56637 and 8A TPS56837

• Industrial PC, EPOS, factory automation and control
• Multifunction printers, video conference system
• Monitors, TV, speakers, PC and notebooks, portable electronics
• General purposes for 12V,19V, 24V power-bus supply

Figure 4-1. RPA Package, 10-Pin VQFN-HR (Top View)

Table 4-1. Pin Functions

The electrical ratings specified in this section apply to all specifications in this document unless otherwise noted. These specifications are interpreted as conditions that do not degrade the parametric or functional specifications of the device for the life of the product containing it. Typical values correspond to TJ = 25°C, VIN = 24V. Minimum and maximum limits are based on TJ = -40°C to +150°C, VIN = 4.5V to 28V (unless otherwise noted).

Over the recommended operating junction temperature range of -40°C to +150°C (unless otherwise noted) (1)

Over the recommended operating junction temperature range of -40°C to 150°C (unless otherwise noted). (1)

The schematic of Figure 7-1 shows a typical application for TPS56A37. This design converts an input voltage range of 5.5V to 28V down to 5V with a maximum output current of 10A.

• (1) For more information, see Section 10.
• (2) The package size (length × width) is a nominal value and includes pins, where applicable.

Iout (A)

Efficiency, Vout = 5V, Fsw = 500kHz