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See Technical Specifications

LM5155QDSSTQ1

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM5155QDSSTQ1
Datasheet:

LM5155QDSSTQ1 Datasheet (PDF)
Topology:

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

1.5
Vin (max) (V):

45
Vout (min) (V):

1.5
EDA/CAD Models:

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LM5155QDSSTQ1 General Description

The LM5155x-Q1 (LM5155-Q1 and LM51551-Q1) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The LM5155x-Q1 can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.

Key Features

AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C T A
Functional Safety-Capable
- Documentation available to aid functional safety system design
Wide input operating range for car and portable battery applications
- 3.5-V to 45-V Operating range
- 2.97-V to 16-V When BIAS = VCC
- Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
- Input transient protection up to 50 V
Minimized battery drain
- Low shutdown current (I Q ≤ 2.6 µA)
- Low operating current (I Q ≤ 480 µA)
Small solution size and low cost
- Maximum switching frequency of 2.2 MHz
- 12-Pin WSON package (3 mm × 2 mm) with wettable flanks and non-wettable flank option
- Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
- Minimized undershoot during cranking (start-stop application)
Higher efficiency with low-power dissipation
- 100-mV ±7% Low current limit threshold
- Strong 1.5-A peak standard MOSFET driver
- Supports external VCC supply
Avoid AM band interference and crosstalk
- Optional clock synchronization
- Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
Integrated protection features
- Constant peak current limiting over input voltage
- Optional hiccup mode short-circuit protection (see the Device Comparison Table)
- Programmable line UVLO
- OVP protection
- Thermal shutdown
Accurate ±1% accuracy feedback reference
Programmable extra slope compensation
Adjustable soft start
PGOOD indicator
Create a custom design using the LM5155x with the WEBENCH power designer

Specifications

Topology	Boost, Flyback, SEPIC	Vin (min) (V)	1.5
Vin (max) (V)	45	Vout (min) (V)	1.5
Vout (max) (V)	300	Regulated outputs (#)	1
Switching frequency (min) (kHz)	100	Switching frequency (max) (kHz)	2200
Iq (typ) (mA)	0.45	Features	Adjustable current limit, Frequency synchronization, Nonsynchronous rectification, Power good, UVLO adjustable
Duty cycle (max) (%)	93	TI functional safety category	Functional Safety-Capable
Rating	Automotive	Operating temperature range (°C)	-40 to 125, -40 to 150
Type	Controller	feature-topology	Step Up
feature-number-of-outputs	1	feature-output-voltage-v	1.5 to 300
feature-minimum-output-current-a		feature-maximum-output-current-a
feature-minimum-input-voltage-v	2.97	feature-maximum-switching-frequency-khz	2200
feature-maximum-input-voltage-v	45	feature-operating-supply-voltage-v	2.97 to 45
feature-maximum-supply-current-ma	0.48(Typ)	feature-maximum-power-dissipation-mw
feature-minimum-switching-frequency-khz	100	feature-synchronous-rectifier	Yes
feature-synchronous-clock	Yes	feature-packaging	Tape and Reel
feature-rad-hard		feature-pin-count	12
feature-cecc-qualified		feature-esd-protection
feature-military	No	feature-aec-qualified	Yes
feature-aec-qualified-number	AEC-Q100	feature-auto-motive	Yes
feature-p-pap	Yes	feature-eccn-code	EAR99
feature-svhc	No	feature-svhc-exceeds-threshold	No