Monolithic Power Systems Inc. MP1911GTL-P

Overview

MP1911GTL-P from Monolithic Power Systems is a 2.5V–16V, 1A H-bridge motor driver IC with integrated N-channel MOSFETs, internal charge pump, and configurable current limiting via ILIM pin. It delivers forward/reverse/brake/coast/sleep modes for bidirectional DC motor control in space-constrained IR-cut camera actuators. Key confirmed specs: 500mΩ total R_DS(ON) (HS + LS), 50nA sleep current, 150°C thermal shutdown, and cycle-by-cycle OCP with external resistor programming.

For engineers reviewing the MP1911GTL-P datasheet, MP1911GTL-P pinout, MP1911GTL-P application, or MP1911GTL-P equivalent, this page provides verified functional context, real-world timing behavior (t_{SLP_ENTRY} = 1–2ms, t_{SLP_RECOVERY} = 230μs), protection thresholds (UVLO = 1.7V ±0.1V, OTP = 150°C), and package-specific layout guidance for SOT583.

Technical Context

The MP1911GTL-P implements a fully integrated H-bridge using four N-channel power MOSFETs driven by an internal charge pump that sustains gate voltage above VIN across its full 2.5V–16V input range. Its dual-input logic (IN1/IN2) directly maps to five discrete output states without external decoding.

Current regulation uses constant-off-time PWM with programmable trip threshold (V_{ITRIP_R} = 1.21V typ, ILIM_SR = 80µA/A), minimum off time (5µs), and maximum off time (30µs) to manage decay dynamics and prevent audible noise during slow-decay braking. Protection includes UVLO (1.7V rising, 100mV hysteresis), SCP (10ms fault hold), and OTP (150°C, 30°C hysteresis).

Key Specifications

Pinout & Package

SOT583 package: 1.6mm × 2.1mm, 8-pin, exposed thermal pad, MSL Level 1, compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge driver applications.

Compared with TB67H420FTG and VN772KHFTR, the MP1911GTL-P uniquely combines SOT583 size, 50nA sleep current, and self-contained charge pump - making it the only option capable of driving IR-cut actuators from 3.3V with sub-microwatt standby and zero external gate-drive components.

Availability

MP1911GTL-P is available at Aetrix Electronics and suitable for infrared-cut camera modules, smart meter tamper mechanisms, and battery-powered smart locks requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP1911GTL-P 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

Monolithic Power Systems (MPS) designs high-performance power management semiconductors, emphasizing integration, efficiency, and thermal robustness for consumer, industrial, and automotive markets.

The MP1911 product line targets compact, low-power bidirectional motor control - specifically engineered for optical actuation, security hardware, and IoT endpoint devices where size, sleep current, and input voltage flexibility are critical.

FAQ

What is the minimum input voltage required for reliable operation of MP1911GTL-P?

The MP1911GTL-P operates down to 2.5V nominal input, with under-voltage lockout releasing at 1.7V (±0.1V). Below 2.5V, gate drive margin degrades due to charge pump limitations, and output current capability drops below 1A. Verified operation starts consistently at 2.5V across -40°C to +125°C junction temperature range.

Can MP1911GTL-P drive inductive loads without external flyback diodes?

Yes - the integrated N-channel MOSFETs provide inherent body-diode paths, and the H-bridge architecture supports active freewheeling (coast) and slow-decay (brake) modes. No external diodes are required for typical IR-cut solenoid or small DC motor loads rated ≤1A and ≤100µH inductance.

How does the ILIM pin set current limit, and what resistor value yields 1A trip?

The ILIM pin sinks 80µA per amp of output current. To achieve 1A trip, connect a 10kΩ resistor from ILIM to GND: V_ILIM = 80µA × 1A × 10kΩ = 0.8V. The internal comparator triggers at V_{ITRIP_R} = 1.21V, so trip occurs when load current reaches 1.51A - confirming 1A design margin with standard 10kΩ.

What is the thermal performance of MP1911GTL-P in SOT583 at 1A continuous load?

In a 2-layer JEDEC-standard board (EV1911-TL-00A), θ_JA = 70°C/W. At 1A and 500mΩ R_DS(ON), power dissipation is 500mW, resulting in ~35°C rise above ambient. Junction temperature remains well below 150°C thermal shutdown threshold even at 85°C ambient, provided the thermal pad is soldered to ≥1cm² copper pour.

Does MP1911GTL-P support PWM speed control, and what is the recommended frequency range?

Yes - the device accepts logic-level PWM on IN1/IN2 inputs. Electrical characteristics specify timing parameters (t₁ = 200ns, t₂ = 300ns) supporting PWM frequencies up to 100kHz. For optimal efficiency and minimal audible noise, 20–50kHz is recommended; lower frequencies (1–5kHz) increase conduction loss and may induce vibration in solenoid loads.

Is VCAP pin mandatory, and what happens if left unconnected?

VCAP must be left open only in non-switching applications (e.g., static coast/brake use). In any mode involving PWM or frequent direction changes, a 100nF ceramic capacitor between VCAP and VIN is mandatory - omission causes gate drive collapse, MOSFET shoot-through, and immediate thermal failure under load.

What protection features activate during a short-circuit event at OUT1 or OUT2?

During OUT-to-GND or OUT-to-VIN short, the internal current sense detects >2× rated current within microseconds and triggers secondary SCP: all MOSFETs disable for 10ms, then auto-retry. Concurrently, OTP monitors die temperature and forces latched shutdown if 150°C is exceeded before SCP recovery completes.