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See Technical Specifications

LM3478QMMX/NOPB

40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM3478QMMX/NOPB
Datasheet:

LM3478QMMX/NOPB Datasheet (PDF)
Topology:

Boost, Flyback, Forward, SEPIC
Vin (min) (V):

2.97
Vin (max) (V):

40
Vout (min) (V):

1.26
EDA/CAD Models:

Request Free CAD Models for LM3478QMMX/NOPB

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LM3478QMMX/NOPB General Description

The LM3478Q-Q1 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use in topologies requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478Q-Q1 can be operated at extremely high switching frequency in order to reduce the overall solution size. The switching frequency of the LM3478Q-Q1 can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3478Q-Q1 has built in features such as thermal shutdown, short-circuit protection, over voltage protection, etc. Power saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

Key Features

LM3478Q-Q1 is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
8-lead VSSOP-8
Internal Push-Pull Driver With 1-A Peak Current Capability
Current Limit and Thermal Shutdown
Frequency Compensation Optimized With a Capacitor and a Resistor
Internal Soft Start
Current Mode Operation
Undervoltage Lockout With Hysteresis
Create a Custom Design Using the LM3478 with the WEBENCH Power Designer

Specifications

Topology	Boost, Flyback, Forward, SEPIC	Vin (min) (V)	2.97
Vin (max) (V)	40	Vout (min) (V)	1.26
Vout (max) (V)	500	Regulated outputs (#)	1
Switching frequency (min) (kHz)	100	Switching frequency (max) (kHz)	1000
Iq (typ) (mA)	2.7	Features	Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Nonsynchronous rectification, Pre-Bias Start-Up
Duty cycle (max) (%)	100	Rating	Automotive
Operating temperature range (°C)	-40 to 125	Type	Controller
feature-topology	Step Up	feature-number-of-outputs	1
feature-output-voltage-v	1.26(Min)	feature-minimum-output-current-a
feature-maximum-output-current-a	1	feature-minimum-input-voltage-v	2.97
feature-maximum-switching-frequency-khz	1000	feature-maximum-input-voltage-v	40
feature-operating-supply-voltage-v	2.97 to 40	feature-maximum-supply-current-ma	2.7(Typ)
feature-maximum-power-dissipation-mw		feature-minimum-switching-frequency-khz	100
feature-synchronous-rectifier		feature-synchronous-clock
feature-packaging	Tape and Reel	feature-rad-hard
feature-pin-count	8	feature-cecc-qualified	No
feature-esd-protection		feature-military	No
feature-aec-qualified	Yes	feature-aec-qualified-number	AEC-Q100
feature-eccn-code	EAR99	feature-svhc	No
feature-svhc-exceeds-threshold	No