LMZ14201TZX

Part: LMZ14201 — Texas Instruments

Type: SIMPLE SWITCHER Step-Down DC-DC Power Module

Description: 6–42 V input, 1 A step-down power module with integrated shielded inductor, 0.8–6 V adjustable output and efficiency up to 90% (92% typical at VIN = 24 V, VO = 3.3 V, IO = 1 A).

Operating Conditions:

• Supply voltage (VIN): 6–42 V
• Operating junction temperature: -40 to 125 °C
• Output voltage range: 0.8 V to 6 V
• EN pin: 0 to 6.5 V

Absolute Maximum Ratings:

• Max VIN, RON to GND: 43.5 V
• Max EN, FB, SS to GND: 7 V
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C
• ESD (HBM): ±2000 V

Key Specs:

• Feedback reference voltage (VFB): 0.798 V typ; 0.777–0.818 V over TJ = -40 to 125 °C, IO = 1 A
• EN rising threshold: 1.18 V typ (1.10–1.25 V over TJ range); 90 mV hysteresis
• Soft-start source current: 8 μA typ (5–11 μA over TJ range)
• Current limit (DC average): 1.95 A typ (1.4–3 A over TJ range)
• Minimum ON time: 150 ns typ; OFF time: 260 ns typ
• Non-switching input current (VFB = 0.86 V): 1 mA typ; shutdown current (VEN = 0 V): 25 μA typ
• Output voltage ripple: 8 mVPP typ; load regulation 1.5 mV/A; line regulation 0.01% (VIN = 12–42 V, IO = 1 A)
• Thermal shutdown: 165 °C rising, 15 °C hysteresis
• RθJA: 19.3 °C/W (4-layer JEDEC PCB), 21.5 °C/W (2-layer JEDEC PCB)

Features:

• Integrated shielded inductor
• Simple PCB layout
• Flexible start-up sequencing using external soft-start and precision enable
• Protection: input UVLO, output overvoltage, short circuit, current limit, thermal shutdown
• Start-up into prebiased output
• Switching frequency adjustable up to 1 MHz with a single resistor
• Operates at high ambient temperature with no thermal derating
• Low radiated emissions (tested to EN55022 Class B)
• Fast transient response for powering FPGAs and ASICs
• Pin-to-pin compatible with the LMZ1420x and LMZ1200x families
• Enabled for WEBENCH Power Designer
• Requires only three external resistors and four external capacitors

Applications:

• Point-of-load conversion from 12 V and 24 V input rails
• Time-critical projects
• Space-constrained and high-thermal-requirement applications
• Negative output voltage applications (see AN-2027)

Package:

• TO-PMOD (NDW), 7 pins, 10.16 mm × 9.85 mm (nominal), with exposed pad

• 1 · Integrated Shielded Inductor
• Simple PCB Layout
• Flexible Start-Up Sequencing Using External SoftStart and Precision Enable
• Protection Against Inrush Currents and Faults Such as Input UVLO and Output Short Circuit
• -40°C to 125°C Junction Temperature Range
• Single Exposed Pad and Standard Pinout for Easy Mounting and Manufacturing
• Fast Transient Response for Powering FPGAs and ASICs
• Low Output Voltage Ripple
• Pin-to-Pin Compatible Family:
• -LMZ1420x (42 V Maximum 3 A, 2 A, 1 A)
• -LMZ1200x (20 V Maximum 3 A, 2 A, 1 A)
• Fully Enabled for WEBENCH ® Power Designer
• Electrical Specifications
• -6-W Maximum Total Output Power
• -Up to 1-A Output Current
• -Input Voltage Range 6 V to 42 V
• -Output Voltage Range 0.8 V to 6 V
• -Efficiency up to 90%
• Performance Benefits
• -Operates at High Ambient Temperature With No Thermal Derating
• -High Efficiency Reduces System Heat Generation
• -Low Radiated Emissions (EMI) Tested With EN55022 Class B Standard
• -Low External Component Count

Limits are for T J = 25°C only unless otherwise noted. Minimum and Maximum limits are ensured through test, design or statistical correlation. Typical values represent the most likely parametric norm at T J = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 24 V, Vout = 3.3 V

over operating free-air temperature range (unless otherwise noted) (1)(2)(3)

over operating free-air temperature range (unless otherwise noted) (1)

1

• Point of Load Conversions From 12-V and 24-V Input Rail
• Time-Critical Projects
• Space Constrained and High Thermal Requirement Applications
• Negative Output Voltage Applications (See AN-2027) SNVA425