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  • The L99LD02 is a two-phase, constant frequency, current mode boost controller able to drive N-channel power MOSFETs.

    Multi-phase operation is supported by SYNC I/O pin, providing the phase shifted clock signal. The boost controllers of more devices can be stacked, in order to operate in multi-phase for high power applications. Multi-phase operation reduces system filtering capacitance and inductance requirements.
    The operating frequency is configurable via SPI between 100kHz and 470kHz. Other features include an internal 10V LDO for the gate drivers, soft-start, device supply option from boost output and pre-configurable operation in Limp Home.

    Key Features

    • AEC-Q100 qualified
    • General
      • 32-bit ST SPI communication v 4.1
      • Stand-alone operation supported
      • QFN32L 5x5 with exposed pad
      • Timeout watchdog and Limp Home function
    • Boost section
      • Wide input range: 3V to 28V operation
      • Device supply option from boost output
      • Adjustable boost output voltage - up to 80V
      • 10V Gate Driver supply for Standard-Level MOSFETs
      • Internal 10V LDO regulator
      • Fixed frequency architecture -programmable by SPI
      • Dither oscillator parameters as frequency modulation and deviation percentage - programmable by SPI
      • Peak current mode control with programmable Input Current Limitation
      • Constant voltage regulation
      • Adjustable Slope Compensation
      • Soft start
      • Multi-phase operation - up to 4-phase supported
      • SYNC I/O pin for multi-phase operation support
      • Adjustable clock distribution and phase shift
      • Programmable error amplifier gain
      • Fully configurable in Limp Home
    • Protection and diagnostic
      • Boost functionality guaranteed in Cold Cranking
      • Input overcurrent protection - programmable by SPI
      • Thermal warning
      • Thermal shutdown
      • Overvoltage protection (OVP)

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L99LD02Q505
Active
QFN 5X5X1 EPAD3.5 32L WETTF FLAN Automotive Ecopack2
L99LD02Q505TR
Active
QFN 5X5X1 EPAD3.5 32L WETTF FLAN Automotive Ecopack2

L99LD02Q505

Package:

QFN 5X5X1 EPAD3.5 32L WETTF FLAN

Material Declaration**:

Marketing Status

Active

Package

QFN 5X5X1 EPAD3.5 32L WETTF FLAN

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L99LD02Q505TR

Package:

QFN 5X5X1 EPAD3.5 32L WETTF FLAN

Material Declaration**:

Marketing Status

Active

Package

QFN 5X5X1 EPAD3.5 32L WETTF FLAN

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L99LD02Q505 No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tray QFN 5X5X1 EPAD3.5 32L WETTF FLAN 150 -40 THAILAND
L99LD02Q505TR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel QFN 5X5X1 EPAD3.5 32L WETTF FLAN 150 -40 THAILAND 0.8589 / 1k

L99LD02Q505

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tray

Package

QFN 5X5X1 EPAD3.5 32L WETTF FLAN

Operating Temperature (°C)

(min)

150

(max)

-40

Budgetary Price (US$)* / Qty

Country of Origin

THAILAND

L99LD02Q505TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8589 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFN 5X5X1 EPAD3.5 32L WETTF FLAN

Operating Temperature (°C)

(min)

150

(max)

-40

Budgetary Price (US$)* / Qty

0.8589 / 1k

Country of Origin

THAILAND

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors