MAX20052B

Part: MAX20052CATC/V+ — Maxim Integrated (MAX20050–MAX20053 family)

Type: Synchronous Buck HB LED Driver (automotive)

Description: 4.5–65 V input (4.5–36 V for "C" versions), 2 A fully synchronous step-down HB LED driver with integrated 0.14 Ω (typ) MOSFETs, high-side current sensing, and 2.1 MHz switching frequency for the MAX20052.

Operating Conditions:

• Supply voltage: 4.5–65 V (4.5–36 V for MAX20050C/51C/52C/53C/53D)
• Operating temperature: -40 to +125 °C
• Switching frequency: 2.1 MHz (MAX20052/53), 400 kHz (MAX20050/51)
• REFI analog dimming range: 0.2–1.2 V

Absolute Maximum Ratings:

• IN to AGND: -0.3 to +70 V (-0.3 to 40 V for C versions)
• BST to AGND: -0.3 to +75 V (-0.3 to 45 V for C versions)
• Continuous current on LX: 2.1 A
• Continuous current on IN: 1.6 A (TDFN), 1.8 A (TQFN), 2.1 A (TSSOP)
• Junction temperature: +150 °C
• Storage temperature: -65 to +150 °C

Key Specs:

• Quiescent supply current, PWM = 0: 5 μA typ (8 μA max) at VIN = 12 V
• Supply current, PWM = 100% switching, VIN = 12 V (MAX20052/53 and C versions): 20 mA typ
• VCC output: 5 V ±2.5% (4.875–5.125 V); short-circuit current 80 mA typ
• Regulation voltage accuracy at REFI = 1.2 V: 196–204 mV (200 mV typ)
• Switching frequency (MAX20052/53): 1890–2310 kHz, 2100 kHz typ
• High-side RDS(on): 170 mΩ typ (340 mΩ max); low-side: 140 mΩ typ (300 mΩ max)
• Cycle-by-cycle current limit: 285–315 mV sense voltage
• Thermal shutdown: 165 °C typ, 10 °C hysteresis

Features:

• AEC-Q100 qualified
• Fully synchronous 2 A step-down converter
• Internal loop compensation (MAX20050/52) or external compensation (MAX20051/53)
• Spread-spectrum option to reduce EMI
• PWM dimming and analog dimming via REFI
• High-side current regulation with a single LED string connection
• Active-low fault indicator
• Output overload, short-circuit and overtemperature protection
• 5 V, 10 mA LDO output

Applications:

• Daytime running lamps, fog lamps, clearance lamps, corner lamps
• Rear lamps and head lamps
• Commercial, industrial and architectural lighting
• Driver monitoring systems

Package:

• 12-pin TDFN, 3 mm x 3 mm, exposed pad
• 14-pin TSSOP, 5 mm x 4.4 mm, exposed pad
• 24-pin TQFN, 4 mm x 4 mm, exposed pad

• Automotive Ready: AEC-Q100 Qualified
• Fully Synchronous 2A Step-Down Converter with Integrated 0.14Ω (typ) MOSFETs
• Wide 4.5V to 65V Input Supply Range
• Two Switching Frequency Options: 400kHz and 2.1MHz
• Internal Loop Compensation (MAX20050/MAX20052) and External Loop Compensation (MAX20051/MAX20053/MAX20053D) Options
• Switching Frequency Synchronized to PWM Dimming Signal
• Active-Low Fault (FLT) Indicator
• Output Short-Circuit Protection
• High-Side Current Regulation Eliminates One Connection to LED String
• Spread-Spectrum Mode Alleviates EMI Problems
• Low 200mV Full-Scale High-Side Current-Sense Voltage
• REFI Pin Adjusts LED Current Down to Zero
• PWM Dimming Disconnects Both High- and LowSide MOSFET Drivers
• 5V, 10mA LDO Output Provides Bias to Other Circuits
• Ultra-Low Shutdown Current (5μA, typ)
• Output Overload, Short-Circuit, and Overtemperature Protections
• 12-Pin (3mm x 3mm) TDFN, 14-Pin (5mm x 4.4mm) TSSOP, and 24-pin (4mm x 4mm) TQFN Package Options

Ordering Information appears at end of data sheet.

• Daytime Running Lamps (DRLs)
• Fog Lamps
• Clearance Lamps (CLLs)
• Corner Lamps (CLs)
• Rear Lamps
• Head Lamps
• Commercial, Industrial, and Architectural Lighting
• Driver Monitoring Systems (DMS)

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MAX20050-MAX20053

(V IN = 12V, V REFI = 1.2V, V PWM = V CC , T A = T J = -40°C to +125°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)

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Continuous Current on IN for TQFN ....................................1.8A

Continuous Current on IN for TSSOP ..................................2.1A

Short-Circuit Duration on V CC ...................................Continuous

Continuous Power Dissipation (T A = +70°C) (Note 1)

12-Pin TDFN-EP (derate 24.4 mW/°C

above +70°C) ........................................................1951.2mW

14-Pin TSSOP-EP (derate 25.6 mW/°C

above +70°C) ........................................................2051.3mW

Operating Temperature Range ..........................-40°C to +125°C

Junction Temperature ...................................................... +150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................. +300°C

Soldering Temperature (reflow) ....................................... +260°C

The FLT pin goes low when thermal shutdown is activated.

For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . Note that a '+', '#', or '-' in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.