Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP8736DL-LF-Z

Name: MP8736DL-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP8736DL-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MP8736DL-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 20-VFQFN Exposed Pad

Datasheet:: MP8736DL-LF-Z.pdf

Description:: IC REG BUCK ADJ 6A 20QFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,153

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MP8736DL-LF-Z from Monolithic Power Systems is a fully integrated synchronous buck converter with 4.5V–19V input range, 6A output current, 30mΩ/12mΩ integrated high-side/low-side MOSFETs, Constant-On-Time (COT) control for fast transient response, and QFN20 (3×4mm) package. It delivers high efficiency in networking and point-of-load systems where compact size and rapid load-step immunity are critical.

For engineers reviewing the MP8736DL-LF-Z datasheet, MP8736DL-LF-Z pinout, MP8736DL-LF-Z application, or MP8736DL-LF-Z equivalent, this device supports programmable switching frequency (100kHz–2.5MHz), soft-start/soft-shutdown, PGOOD monitoring, and full protection suite (OCP, SCP, OVP, UVP, thermal shutdown) - all in a thermally enhanced 20-pin QFN.

Technical Context

The MP8736 employs Constant-On-Time (COT) control with input-voltage feed-forward via the FREQ pin, enabling stable operation across wide VIN ranges without external compensation. Its internal 5V VCC LDO powers gate drivers, while BST capacitor enables high-side NMOS drive.

It operates in CCM at heavy loads and automatically transitions to skip mode at light loads to maintain >85% efficiency down to 10mA. Protection logic includes cycle-by-cycle OCP with 40μs hold-off timer, immediate SCP latch-off on <50% VREF detection, and non-latching thermal shutdown with 25°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 19V - supports 5V, 12V, and 19V intermediate bus rails without derating.
Output Current	6A continuous - sufficient for FPGA core rails, ASIC I/O supplies, and multi-core SoC power domains.
HS/LS R_DS(on)	30mΩ / 12mΩ - minimizes conduction loss and thermal rise at full load in 3×4mm footprint.
Feedback Reference	0.815V ±1% - enables precise output regulation with standard resistor dividers (e.g., 1.05V @ R1=40.2kΩ, R2=10kΩ).
Switching Frequency	100kHz to 2.5MHz - programmable via external resistor on FREQ pin; supports EMI optimization and small-output-filter design.
Protection Features	SCP, OCP, OVP (125% VREF), UVP (50% VREF), thermal shutdown - eliminates need for external fault management circuitry.
Soft Start Time	Programmable via SS capacitor (e.g., 10nF → ~0.98ms) - prevents inrush current and output overshoot during power-up.

Pinout & Package

MP8736DL-LF-Z is housed in a thermally enhanced QFN20 (3mm × 4mm, 0.5mm pitch) with exposed thermal pad on underside. Package supports high-power density layout with multiple PGND vias and low-inductance IN/SW routing.

Pin/Terminal	Circuit Role	Design Meaning
1 AGND	Analog Ground	Reference for FB, SS, EN, PGOOD; must be isolated from PGND until single-point tie to minimize noise coupling.
2 FREQ	Frequency Set Input	Resistor-to-IN sets ON-time; determines switching frequency and provides line feed-forward for improved transient response.
3 FB	Feedback Input	Monitors output voltage via resistor divider; regulates output to 0.815V reference with ±1% accuracy.
4 SS	Soft Start Control	Capacitor-connected node charged/discharged by 8.5μA current source to ramp output smoothly during enable/disable.
5 EN	Enable Input	Active-high logic input (1.05–1.60V threshold); internal 1MΩ pull-down enables default disable state.
6 PGOOD	Power-Good Output	Open-drain signal asserting high when VOUT ≥ 90% of target (e.g., ≥0.945V for 1.05V rail), with delay = 0.5ms + 50% SS time.
7 BST	Bootstrap Supply	Connects 0.1–1μF capacitor between BST and SW to generate floating gate drive voltage for high-side MOSFET.
8,19 IN	Main Input Supply	High-current input pins; require low-ESR bulk capacitance (CIN) and wide PCB traces to limit ripple and voltage drop.
9,10,17,18 SW	Switch Node	High dv/dt node connecting internal HS/LS FETs to external inductor; demands tight layout and minimal loop area.
11–16 PGND	Power Ground	High-current return path for LS-FET and inductor; must be solid copper plane with multiple thermal vias to exposed pad.
20 VCC	Bias Supply Output	Internal 5V LDO output; requires 1μF ceramic decoupling close to pin to stabilize gate drivers and logic.

Key Features

Feature	Design Value
Proprietary switching loss reduction	Optimized dead-time control and gate driver timing reduce shoot-through and switching losses at high frequencies.
Programmable soft start/stop	8.5μA internal current source enables precise ramp control without external DAC or sequencer dependency.
Fast transient response	COT architecture achieves <10μs recovery from 1A–6A load step with <±2% output deviation under optimal layout.
Integrated power MOSFETs	Monolithic 30mΩ HS + 12mΩ LS FETs eliminate external discrete switch selection and gate driver design effort.
Thermal shutdown with hysteresis	150°C trip with 25°C hysteresis ensures reliable self-protection and automatic recovery without system reset.

Applications

Networking Systems

Broadband Communication

Use Scenario: Powering 10G/25G Ethernet PHYs and SerDes interfaces in switches and routers.

IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1.05V/1.2V core supply with sub-10μs transient response to burst traffic.

Use Value: Maintains signal integrity by limiting output droop to <30mV during 4A load steps, preventing link flapping or packet loss.

Use Scenario: Supplying optical transceiver modules (SFP+, QSFP) in fiber access equipment.

IC Role / Device Role / Timing Role: High-efficiency 3.3V or 1.8V bias rail generator with PGOOD sequencing for hot-plug compliance.

Use Value: Enables rapid power-up (<5ms) and graceful shutdown via soft-start/soft-stop, meeting GR-468 reliability requirements.

Distributed Power Architecture

Industrial Embedded Computing

Use Scenario: Local regulation from 12V backplane to 1.1V FPGA core voltage in modular PLC controllers.

IC Role / Device Role / Timing Role: Compact, thermally robust buck converter operating in forced CCM for predictable thermal behavior.

Use Value: Delivers 6A at >92% efficiency at 12V_IN/1.1V_OUT, reducing board-level heat dissipation vs. larger alternatives.

Use Scenario: Powering ARM-based edge AI accelerators requiring clean, low-noise 0.85V–1.2V core rails.

IC Role / Device Role / Timing Role: Primary DC/DC regulator with integrated protections to meet IEC 62368-1 safety and EMC requirements.

Use Value: Eliminates need for external OVP/UVP comparators and current-sense amplifiers, simplifying BOM and layout validation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
RTQ2132B-QT	4.5V–18V input, 6A, 1.2MHz fixed freq, lower quiescent current (25μA), no FREQ pin	Lacks programmable frequency and COT control; better suited for ultra-low-I_Q always-on rails	Select when fixed-frequency EMI control and minimal standby power outweigh need for fast transient response.
TPS546B24RVFT	4.5V–18V input, 10A, PMBus interface, 0.5% ref accuracy, 2.2MHz max freq	Includes digital telemetry and margining; requires external components for basic operation	Select when remote monitoring, dynamic voltage scaling, or tighter output tolerance (±0.5%) are required.

Compared with RTQ2132B-QT and TPS546B24RVFT, the MP8736DL-LF-Z offers superior transient performance via COT control and smaller solution size due to integrated FETs and minimal external components - ideal for space-constrained, analog-intensive designs where deterministic response matters more than digital configurability.

Availability

MP8736DL-LF-Z is available at Aetrix Electronics and suitable for networking systems, broadband communication equipment, and distributed power architectures requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP8736DL-LF-Z 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) is a fabless semiconductor company specializing in high-performance analog and power ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP8736 belongs to MPS's high-density synchronous buck converter product line, designed specifically for space-constrained, high-efficiency point-of-load applications in communications infrastructure and embedded computing.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP8736DL-LF-Z requires ≥22μF total output capacitance with ≤5mΩ ESR for stable CCM operation. With ceramic capacitors (low ESR), external ramp compensation (R4/C4) is mandatory per Equation 7 in the datasheet to ensure slope compensation and avoid subharmonic oscillation.

How does the FREQ pin affect switching frequency and transient performance?

The FREQ pin sets ON-time via an external resistor to IN, directly determining switching frequency (100kHz–2.5MHz). Higher frequency improves transient response but increases switching loss; lower frequency improves light-load efficiency. Feed-forward from VIN enhances line transient rejection.

Can the MP8736DL-LF-Z operate with only ceramic output capacitors?

Yes, but external ramp compensation (R4/C4 network) is required to stabilize the control loop. Without it, low-ESR ceramics cause insufficient VFB ripple slope, leading to subharmonic oscillation in CCM. The ramp must satisfy Equation 5 in the datasheet for reliable operation.

What happens during short-circuit condition and how is recovery handled?

Upon short circuit, the MP8736DL-LF-Z triggers immediate SCP latch-off when FB drops below 50% of 0.815V (≤408mV) while current limit is active. Recovery requires full power cycle - VIN must be removed and reapplied. No auto-retry or hiccup mode is implemented.

Is the exposed thermal pad electrically connected, and how should it be soldered?

Yes, the exposed pad is internally connected to PGND. It must be soldered to a dedicated thermal pad on the PCB with ≥9 solder paste apertures and ≥6 thermal vias (0.3mm diameter) to an inner ground plane. Improper connection causes thermal shutdown at <4A load.

Does the MP8736DL-LF-Z support parallel operation for higher current?

No, the MP8736DL-LF-Z lacks current-sharing pins or master/slave synchronization capability. Parallel operation is not supported and may cause instability or unequal current distribution due to timing mismatches between independent COT controllers.

What is the maximum allowable junction temperature before thermal shutdown activates?

Thermal shutdown activates at TJ = 150°C ±5°C, with 25°C hysteresis. Once triggered, the device disables switching and enters thermal shutdown until junction temperature falls to ~125°C, then resumes soft-start sequence automatically.

MP8736DL-LF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 20-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 4.5V

Voltage - Input (Max):: 19V

Voltage - Output (Min/Fixed):: 0.815V

Voltage - Output (Max):: 19V

Current - Output:: 6A

Frequency - Switching:: 100kHz ~ 2.5MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-QFN (3x4)

MP8736DL-LF-Z FAQ

1.How can I place an order for MP8736DL-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP8736DL-LF-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP8736DL-LF-Z reliable?

The price and inventory of MP8736DL-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8736DL-LF-Z is usually 5 days.

3.What payment methods are accepted for MP8736DL-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8736DL-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP8736DL-LF-Z?

MP8736DL-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP8736DL-LF-Z order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP8736DL-LF-Z?

For technical support, including MP8736DL-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8736DL-LF-Z requirements.

6.How does Aetrix verify that MP8736DL-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP8736DL-LF-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP8736DL-LF-Z meets industry standards.

7.What is the process for return or replacement of MP8736DL-LF-Z?

All MP8736DL-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8736DL-LF-Z, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP8736DL-LF-Z part is unused and in its original packaging.

Return procedure for MP8736DL-LF-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…