onsemi FAN2013BMPX

Overview

FAN2013BMPX from ON Semiconductor is a 2A synchronous PWM buck regulator with current-mode control, operating from 4.5V–5.5V input and delivering adjustable 0.8V–2.5V output. It features fixed 1.2 MHz switching frequency, power-good flag, and integrated PMOS/NMOS switches in a 3×3 mm MLP package-designed for point-of-load regulation in notebook computers and communications equipment.

For engineers reviewing the FAN2013BMPX datasheet, pinout, applications, or equivalent options, key selection criteria include its 2A continuous output capability, 95% peak efficiency, soft-start function, UVLO/thermal/OVP protections, and compatibility with standard 2.2 µH inductors and ceramic input/output capacitors.

Technical Context

The FAN2013BMPX implements a fixed-frequency (1.2 MHz) current-mode PWM architecture with cycle-by-cycle peak current limiting (3.5 A typical) and internal soft-start that ramps switch current in four digital steps. Its control loop maintains tight line and load regulation across –40°C to +85°C ambient.

It integrates complementary P-channel (90 mΩ R_ON) and N-channel (90 mΩ R_ON) MOSFETs, uses an external resistor divider on FB for output voltage setting, and provides open-drain PG assertion at 0.9×V_OUT with 1% hysteresis and 100 µs delay.

Key Specifications

Pinout & Package

The FAN2013BMPX is housed in a thermally enhanced 3×3 mm, 6-lead Molded Leadless Package (MLP) with exposed thermal pad. AGND and PGND must be connected to PCB ground plane for optimal thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with TPS54202DRCT and RT7295BGJ6F, the FAN2013BMPX offers tighter input voltage range (4.5–5.5 V), lower quiescent current (10–16 mA), guaranteed soft-start timing (~800 µs), and fully integrated compensation-making it optimal for cost-sensitive, space-constrained 5 V rail applications where simplicity and predictability are prioritized.

Availability

FAN2013BMPX is available at Aetrix Electronics and suitable for notebook computer power rails, communications equipment point-of-load regulation, and hard disk drive actuator supplies requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for FAN2013BMPX 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

ON Semiconductor is a global supplier of energy-efficient semiconductor solutions, specializing in power management, analog, sensor, and logic devices for automotive, industrial, and computing markets.

The FAN2013BMPX belongs to Fairchild's legacy high-efficiency DC-DC regulator portfolio, acquired by ON Semiconductor in 2016, and was engineered specifically for low-voltage, high-current point-of-load conversion in portable and space-constrained electronics.

FAQ

What is the recommended input capacitor value for stable operation of the FAN2013BMPX?

The FAN2013BMPX requires a minimum 10 µF low-ESR ceramic input capacitor placed as close as possible to the VIN and AGND pins. Recommended values range from 10 µF to 20 µF (e.g., Taiyo Yuden JMK212BJ106MG). This ensures adequate high-frequency decoupling and suppresses switching noise on the 4.5–5.5 V input rail, preventing instability or premature UVLO triggering during transients. The FAN2013BMPX datasheet specifies this range under Recommended Operating Conditions.

Does the FAN2013BMPX require external compensation components?

No, the FAN2013BMPX does not require external compensation components. Its current-mode control architecture and internal compensation network are fully integrated, enabling stable operation with standard 2.2 µH inductors and 20–40 µF ceramic output capacitors. This eliminates the need for external RC networks or loop compensation tuning, simplifying design and reducing BOM count for the FAN2013BMPX in typical point-of-load applications.

What is the exact thermal shutdown behavior of the FAN2013BMPX?

The FAN2013BMPX triggers thermal shutdown when junction temperature exceeds 150°C and remains latched off until die temperature falls to approximately 130°C, at which point it initiates a full soft-start cycle. This 20°C hysteresis prevents thermal cycling near the trip point. The thermal protection is independent of load current and activates solely based on die temperature sensed internally-ensuring safe operation of the FAN2013BMPX even under sustained overload or poor heatsinking conditions.

How is the power-good (PG) signal asserted for the FAN2013BMPX?

The FAN2013BMPX asserts its open-drain PG signal high when the FB pin voltage reaches 0.9 × V_OUT (e.g., 1.08 V for a 1.2 V output), with 1% hysteresis and a 100 µs delay after regulation is achieved. PG remains high as long as output stays within ±5% of target; it pulls low during startup, fault conditions, or output droop. This behavior is specified in the Electrical Characteristics table for the FAN2013BMPX and enables reliable system power sequencing.

Can the FAN2013BMPX operate with an input voltage below 4.5 V?

No, the FAN2013BMPX is not rated for operation below 4.5 V input. Its UVLO threshold is 3.4–4.0 V (rising), but the Recommended Operating Conditions specify a minimum 4.5 V to ensure guaranteed 2 A output current, stable 1.2 MHz switching, and full protection functionality. Operation below 4.5 V may result in reduced output current capability, increased ripple, or failure to regulate-so designs must maintain VIN ≥4.5 V for compliant FAN2013BMPX performance.