Texas Instruments LM51770-Q1 Product Info

Parameters

Rating	Automotive
Topology	Buck-Boost
Vin (max) (V)	78
Vout (max) (V)	78
Vout (min) (V)	3.3
Features	1% reference, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Advanced power saving, Bidirectional, Current monitoring, Enable, Forced PWM, Frequency synchronization, Hiccup mode protection, Light Load Efficiency Mode, Pass-through mode, Power good, Tracking, adjustable UVLO
EMI features	Frequency Dithering, Spread Spectrum
Duty cycle (max) (%)	100
TI functional safety category	Functional Safety-Capable
Operating temperature range (°C)	-40 to 150

Package

HTSSOP (DCP)-38-62.08 mm² 9.7 x 6.4

Features

Wide input range from 3.5V to 80V (85V absolute maximum)
- Minimum 2.8V when V(BIAS) > 3.5V
Output voltage from 3.3V to 78V
Low shutdown IQ of 3µA
Low operating IQ of 60µA
3% reverse current limit accuracy for precise charging currents
Average input and output current monitor or limiter
Dynamic output voltage tracking for PWM or analog input signals
Power save mode (PSM) selectable for high light load efficiency
Two integrated high-voltage supply LDOs with automatic selection
2A peak current logic level gate driver with integrated bootstrap diode and bootstrap voltage protections
Fixed frequency across all operating modes (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching up to 2MHz for small solution and component size
- External clock synchronization
Spread spectrum operation selectable
Adjustable undervoltage protection
Hiccup overcurrent and short protection
AEC-Q100 qualified for automotive applications
- Test temperature grade 1: –40°C to +150°C
Functional Safety-Capable
- Documentation available to aid functional safety system design

Wide input range from 3.5V to 80V (85V absolute maximum)
- Minimum 2.8V when V(BIAS) > 3.5V
Output voltage from 3.3V to 78V
Low shutdown IQ of 3µA
Low operating IQ of 60µA
3% reverse current limit accuracy for precise charging currents
Average input and output current monitor or limiter
Dynamic output voltage tracking for PWM or analog input signals
Power save mode (PSM) selectable for high light load efficiency
Two integrated high-voltage supply LDOs with automatic selection
2A peak current logic level gate driver with integrated bootstrap diode and bootstrap voltage protections
Fixed frequency across all operating modes (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching up to 2MHz for small solution and component size
- External clock synchronization
Spread spectrum operation selectable
Adjustable undervoltage protection
Hiccup overcurrent and short protection
AEC-Q100 qualified for automotive applications
- Test temperature grade 1: –40°C to +150°C
Functional Safety-Capable
- Documentation available to aid functional safety system design

Description

The LM51770-Q1 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power save mode, the device supports high efficiency with low output loads due to its low quiescence currents. In power save mode, the device supports high efficiency close to 99% efficiency over the full range of the output current. The LM51770-Q1 runs at a fixed switching frequency, which is set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor helps monitor and limit input and output current of the LM51770-Q1. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).

ELECTRONIC COMPONENTS
All In One Distributor

LM51770-Q1

78V wide VIN bidirectional 4-switch buck-boost controller

Texas Instruments LM51770-Q1 Product Info

Parameters

Package

Features

Description

SUBMITTED SUCCESSFULLY！

ELECTRONIC COMPONENTS All In One Distributor

LM51770-Q1

78V wide VIN bidirectional 4-switch buck-boost controller

Texas Instruments LM51770-Q1 Product Info

Parameters

Package

Features

Description

SUBMITTED SUCCESSFULLY！

ELECTRONIC COMPONENTS
All In One Distributor