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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics L99MD01XPTR

Name: L99MD01XPTR
Brand: STMicroelectronics
SKU: L99MD01XPTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L99MD01XPTR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: 36-PowerBFSOP (0.295", 7.50mm Width)

Datasheet:: L99MD01XPTR.pdf

Description:: IC PTS SMARTPOWER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L99MD01XPTR from STMicroelectronics is an octal half-bridge driver IC for automotive HVAC flap actuation and stepper/DC motor control. It integrates 8 independently controllable half-bridges (RON = 0.9 Ω HS / 0.64 Ω LS @ 25 °C), SPI interface, dual current monitor outputs, intrinsic boost converter for external MOSFET drive, and full diagnostic coverage including overtemperature, open-load, and overcurrent detection.

For engineers reviewing the L99MD01XPTR datasheet, L99MD01XPTR pinout, L99MD01XPTR application, or L99MD01XPTR equivalent, key selection criteria include its 8-channel half-bridge architecture, 0.8 A minimum current limit per output, 3.0–5.3 V VCC supply, 6–18 V VS operating range, and SPI-configurable PWM hold current for stepper motors in automotive climate control systems.

Technical Context

The L99MD01XPTR implements two independent 4-output power domains (VSA drives OUT1–OUT4; VSB drives OUT5–OUT8), each with dedicated high-side and low-side DMOS transistors and integrated freewheeling diodes for inductive load handling. Its internal 24-bit SPI interface supports command-based control, status readback, and register configuration-including per-channel PWM duty cycle (15%/30%/45%/60%) and frequency (~100 Hz).

It embeds a spread-spectrum SMPS controller (programmable wobble oscillator: 1.95–15.6 kHz; frequency modulation: 0–20%) to drive an external MOSFET for voltage boosting, enabling simultaneous 4-bipolar-stepper operation. Diagnostics are filtered (≥32 µs for overload; ~2 ms for open-load) and latched, requiring microcontroller-initiated clear operations to restore functionality after fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	8 independent half-bridges, configurable as 4 bipolar stepper motors or up to 7 DC motors in sequential mode.
HS/LS R_ON	0.9 Ω (HS) / 0.64 Ω (LS) @ T_j = 25 °C - enables <1 W conduction loss per channel at 1 A.
Current limit	Min. 0.8 A per output - ensures reliable torque delivery for HVAC damper actuators under stall conditions.
VCC supply	3.0–5.3 V - compatible with standard automotive microcontroller I/O rails and POR thresholds (VPOR_OFF = 2.75 V).
VS operating range	6–18 V - supports 12 V battery systems with cold-crank and load-dump tolerance.
Standby current	Typ. 5 µA - meets automotive low-power requirements during vehicle sleep modes.
SPI interface	24-bit standard Serial Peripheral Interface - enables full diagnostics (open-load, overtemp, overcurrent) and register-level control without external logic.

Pinout & Package

Package: PowerSSO-36 (exposed thermal pad, ECOPACK® compliant, 10.2 mm × 7.6 mm body, 0.65 mm pitch).

Pin/Terminal	Circuit Role	Design Meaning
VCC	Logic supply input	Powers internal logic, SPI interface, and control circuitry; POR triggers reset if <2.55 V.
VS, VSA, VSB	Main power inputs	VS: system rail (6–18 V); VSA/VSB: independent 4-channel power domains (OUT1–4 / OUT5–8).
EN	Enable input	Active-high enable; pulling low forces standby mode (5 µA quiescent, all outputs disabled).
CSN, SCK, SDI, SDO	SPI interface signals	Standard 4-wire SPI (chip select, clock, data in, data out); 24-bit frame supports status read/clear and register write.
OUT1–OUT8	Half-bridge outputs	Each provides high-side + low-side DMOS switching; internally protected against short-circuit and overtemperature.
CURR1, CURR2	Current monitor outputs	Analog current-sense outputs (programmable ratio: 1/250–1/1000); multiplexed per channel via SPI for motor state analysis.
TW, SD	Thermal warning/shutdown flags	Open-drain outputs indicating junction temperature ≥150 °C (warning) or ≥175 °C (shutdown); latched until cleared by SPI.

Key Features

Feature	Design Value
Integrated SMPS controller	Programmable wobble oscillator (1.95–15.6 kHz) and frequency modulation (0–20%) enables efficient external boost stage for 4-stepper simultaneous operation.
Per-channel PWM hold current	Configurable 100 Hz PWM (15%/30%/45%/60% duty) reduces coil heating during stepper holding without external timing components.
Dual current monitor outputs	Two programmable analog outputs (CURR1/CURR2) support real-time motor state detection (start/stall/free-run) via current profiling.
Comprehensive diagnostics	Latched, filter-validated status bits for open-load (2 ms), overcurrent (32 µs), over/undervoltage, and thermal events - all accessible via SPI read.
Automotive-grade protection	Short-circuit, overtemperature, and cross-current protection on all 8 outputs; EN pin-controlled safe shutdown and recovery.

Applications

Automotive HVAC Flap Control

Stepper Motor Positioning System

Use Scenario: Precise actuation of air distribution flaps in vehicle climate control units.

IC Role / Device Role / Timing Role: Octal half-bridge driver managing 4 independent bipolar stepper motors (2 per flap axis) with SPI-synchronized phase sequencing.

Use Value: Enables simultaneous multi-flap movement with <0.9 Ω HS R_ON minimizing heat rise, while integrated diagnostics prevent false stalls due to mechanical binding.

Use Scenario: Closed-loop positioning of engine cooling fan shroud vanes or throttle bypass valves.

IC Role / Device Role / Timing Role: SPI-configured half-bridge array delivering precise current-limited step pulses and real-time current feedback via CURR1/CURR2.

Use Value: Programmable 0.8 A current limit and 2 ms open-load detection allow reliable stall detection without external sense resistors or comparators.

DC Motor Actuator Module

Automotive Body Control Unit (BCU)

Use Scenario: Driving 4 independent DC motors for seat adjustment, mirror folding, or sunroof mechanisms.

IC Role / Device Role / Timing Role: 8-channel half-bridge enabling concurrent bidirectional control of 4 DC motors with independent enable/PWM per channel.

Use Value: 6–18 V VS range and 5 µA standby current meet OEM BCU power budget constraints while supporting cold-crank operation down to 6 V.

Use Scenario: Centralized motor driver in body control modules managing multiple cabin actuators.

IC Role / Device Role / Timing Role: SPI-managed diagnostic hub providing unified fault reporting (overtemp, open-load, overvoltage) across all connected loads.

Use Value: Latched status registers and SPI-clearable faults reduce MCU polling overhead and simplify ASIL-B–compliant error-handling software design.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE9201SG	8-channel high-side switch (not half-bridge); no integrated SMPS; 1.2 Ω R_ON; requires external H-bridge for bidirectional DC/stepper control.	Lacks native stepper support and current monitoring; suited for unidirectional valve/lock drivers only.	Select when only high-side switching is needed and external bridge + controller are acceptable.
BD37101FV	Quad half-bridge (4 channels); no SPI interface; analog PWM input; no current monitor outputs; 1.1 Ω R_ON.	Requires discrete logic for multi-motor coordination; no embedded diagnostics or fault latching.	Select for cost-sensitive, non-networked applications where SPI configurability and diagnostics are not required.

Compared with TLE9201SG and BD37101FV, the L99MD01XPTR uniquely combines 8 half-bridges, SPI configurability, dual current monitors, and integrated SMPS control-enabling single-chip 4-stepper HVAC solutions without external timing, sensing, or boost circuitry.

Availability

L99MD01XPTR is available at Aetrix Electronics and suitable for automotive HVAC systems, body control units, and stepper-driven cabin actuators requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for L99MD01XPTR 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

STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power management ICs, with broad portfolio coverage and ISO/TS 16949-certified manufacturing.

The L99MD01XPTR belongs to ST's automotive smart power driver family, designed specifically for high-reliability motor actuation in climate control and body electronics where integrated diagnostics, low standby power, and SPI configurability are critical.

FAQ

What is the maximum number of bipolar stepper motors the L99MD01XPTR can drive simultaneously?

The L99MD01XPTR can drive up to four bipolar stepper motors simultaneously using its integrated SMPS boost converter to supply the required higher winding voltage. Without the boost converter, it supports two steppers concurrently or three in sequential mode, as confirmed in Section 1 (Description) and Figure 10 of the datasheet.

How does the current monitor function support motor health monitoring?

The CURR1 and CURR2 outputs provide programmable-ratio (1/250 to 1/1000) analog current images of selected half-bridges, enabling detection of motor start-up surge, free-running current, and stall conditions-critical for predictive maintenance in HVAC flap systems without adding external sense resistors.

What fault conditions trigger automatic output disable, and how is recovery handled?

Overcurrent and thermal shutdown conditions automatically disable affected outputs or all outputs, respectively. These faults are latched and require explicit SPI command to clear the corresponding status bit before re-enabling-ensuring controlled, software-verified recovery per ISO 26262 functional safety requirements.

Is the L99MD01XPTR qualified for automotive use, and what environmental ratings apply?

Yes, the L99MD01XPTR is AEC-Q100 qualified for automotive applications. It operates across −40 °C to +150 °C junction temperature, supports 6–18 V VS supply (cold-crank tolerant), and features ESD protection per HBM ±2 kV (Table 5), meeting stringent OEM environmental and reliability standards.

L99MD01XPTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBFSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: -

Current - Supply:: 5µA

Voltage - Supply:: 3V ~ 5.3V

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-36 EPD

L99MD01XPTR FAQ

1.How can I place an order for L99MD01XPTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L99MD01XPTR 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 L99MD01XPTR reliable?

The price and inventory of L99MD01XPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99MD01XPTR is usually 5 days.

3.What payment methods are accepted for L99MD01XPTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99MD01XPTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L99MD01XPTR?

L99MD01XPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L99MD01XPTR 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 L99MD01XPTR?

For technical support, including L99MD01XPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99MD01XPTR requirements.

6.How does Aetrix verify that L99MD01XPTR is sourced from the original manufacturer or authorized distributors?

All L99MD01XPTR 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 L99MD01XPTR meets industry standards.

7.What is the process for return or replacement of L99MD01XPTR?

All L99MD01XPTR units undergo pre-shipment inspection (PSI). If there is an issue with L99MD01XPTR, 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 L99MD01XPTR part is unused and in its original packaging.

Return procedure for L99MD01XPTR:

1.Submit a request within 90 days.

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

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