Diodes Incorporated DPS1135FIA-13

Overview

DPS1135FIA-13 from Diodes Incorporated is a 24V/5A single-channel hot-swap power switch with integrated MOSFET (R_DS(ON) = 30 mΩ), fast role-swap compliance per USB PD 3.0 v1.0a, and programmable current/voltage limits via external resistors. It supports 4–24V input, delivers fast short-circuit response (2 µs), and integrates port discharge (IN/OUT), reverse-voltage blocking, and thermal shutdown - deployed in USB-C docking stations and industrial power protection.

For engineers reviewing the DPS1135FIA-13 datasheet, DPS1135FIA-13 pinout, DPS1135FIA-13 application, or DPS1135FIA-13 equivalent, key selection criteria include its 7 ms FAULTB blanking time, adjustable dV/dt ramp control (via CDV/DT), dual-port discharge capability (DISC1/DISC2), and I_FASTRIP = 1.125 × I_LIM + 1.8 A short-circuit trip threshold.

Technical Context

The DPS1135FIA-13 implements a fully integrated N-channel MOSFET power switch with analog-programmable overcurrent (ILIM resistor), overvoltage (VLIM resistor), and output voltage ramp rate (CDV/DT capacitor). Its internal regulator (VREG = 4.9–5.2 V) powers auxiliary circuitry and enables bias for external components.

It features dual independent discharge control (DISC1/DISC2), fast role-swap activation via FRS pin (600 µs guaranteed on-time), and fault reporting through open-drain FAULTB with 7 ms deglitch. Reverse-voltage protection triggers at –30 mV (VIN – VOUT) with 2 µs response, and thermal shutdown activates at +165 °C with +20 °C hysteresis.

Key Specifications

Pinout & Package

Housed in a thermally enhanced, lead-free V-QFN4040-17 package (4.0 mm × 4.0 mm × 0.85 mm, exposed thermal pad), the DPS1135FIA-13 uses a 17-pin layout with three IN pins (1–3), three OUT pins (15–17), and dedicated control/monitoring terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hot-swap power switch applications.

Compared with TUSB546IRKTR and TPS25750RWER, the DPS1135FIA-13 uniquely delivers standalone, resistor-programmable 24 V/5 A power switching with dedicated IN/OUT discharge pins, 2 µs short-circuit response, and USB PD 3.0 fast role-swap timing - eliminating MCU dependency and simplifying BOM for cost-sensitive docking and industrial modules.

Availability

DPS1135FIA-13 is available at Aetrix Electronics and suitable for USB-C docking stations, industrial hot-swap modules, and desktop PC power protection requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for DPS1135FIA-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The DPS1135FIA-13 belongs to Diodes' USB Power Delivery and Hot-Swap Power Switch product line, engineered specifically for robust, programmable 24 V rail protection in computing peripherals and industrial equipment.

FAQ

What is the minimum recommended CDV/DT capacitor value for stable 24 V startup?

A 0.51 nF capacitor on the DV/DT pin ensures controlled 24 V ramp-up with t_DV/DT ≈ 0.85 ms, limiting in-rush current to ≤1.5 A into 10 µF C_OUT. Larger values (e.g., 1 nF) extend ramp time to ~1.7 ms, further reducing stress on input bulk capacitors and upstream converters.

How does the DPS1135FIA-13 handle reverse-voltage conditions?

It continuously monitors VIN – VOUT and disables the internal MOSFET within 2 µs when the difference falls below –30 mV, preventing backfeed from downstream sources. Recovery occurs automatically when VIN – VOUT rises above 0 mV, with no latch or manual reset required.

Can DISC1 and DISC2 be asserted simultaneously?

Yes - asserting both DISC1 and DISC2 high enables concurrent discharge of IN and OUT ports, meeting USB PD specification requirements for complete port reset prior to role reversal or reconnection. Discharge resistance remains ~105 Ω per port regardless of combination.

What is the maximum safe continuous output current at +100 °C ambient?

At +100 °C ambient with standard 2 oz copper FR-4 layout (1" × 1" pad), thermal resistance (R_θJA = 58.5 °C/W) limits power dissipation to ~1.1 W, supporting ~4.2 A continuous output (P = I² × R_DS(ON)). Derating curves in Figure 7 confirm 4.5 A is sustainable at +85 °C ambient.