TPS61378-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• AEC-Q100 qualified for automotive applications

– Device temperature grade 1: –40°C to 125°C

ambient operating temperature range

• TPS61378-Q1 Wettable Flank

• TPS61378L-Q1 Immersion Sn

– Provides shorter production cycle time and

longer shelf life

• Function Safety-Capable

– Documentation available to aid functional safety

system design

• Flexible input and output operation range

– Input voltage range: 2.3V to 14V

– Programmable output voltage : 4.0V to 18.5V

– Input voltage range: 2.3V to 14V

– Fixed output options: 5V, 5.25V, and 5.5V

– Programmable peak current limit: 1A to 4.8A

• Avoid AM band interference and crosstalk

– Dynamically programmable switching

frequency: 200kHz to 2.2MHz

– Spread spectrum frequency modulation at

FPWM mode

– Optional clock synchronization

• Minimize solution size for space constraint

applications

– Integrated LS/HS/ISO FET:

RDS(ON) 50mΩ/50mΩ/100mΩ

– Support up to 2.2MHz with small L-C

• Minimized light load and idle state current

consumption

– 25μA quiescent current into VIN pin

– 0.5μA shutdown current into VIN pin

– Selectable auto PFM and forced PWM mode

– True load disconnect during shutdown or fault

conditions

• Integrated protection features

– Supports VIN close to VOUT operation

– Input undervoltage lockout and output

overvoltage protection

– Hiccup output short circuit protection

– Power good indicator

– Thermal shutdown protection at 165°C

• Higher than 90% efficiency under 0.8A load from

3.3V to 9V conversion

2 Applications

• Advanced driver-assistance system (ADAS)

• Automotive infotainment and cluster

• Body electronics and lighting

• Emergency call (eCall)

3 Description

The TPS61378-Q1 is a fully-integrated synchronous

boost converter with an integrated load disconnect

function. The input voltage covers 2.3V to 14V while

the maximal output voltage covers up to 18.5V. The

switching current limit is programmable from 1A to

4.8A. The device consumes 25μA quiescent current

from VIN.

The TPS61378-Q1 employs peak current mode

control with the switching frequency programmable

from 200kHz to 2.2MHz. The device works in fixed

frequency PWM operation in medium to heavy loads.

There are two optional modes in light load by

configuring the MODE pin: auto PFM mode and

forced PWM to balance the efficiency and noise

immunity in light load. The switching frequency can be

synchronized to an external clock. The TPS61378-Q1

uses the spread spectrum of the internal clock to be

more EMI friendly at FPWM mode. In addition, there

is an internal soft-start time to limit the inrush current.

The TPS61378-Q1 has various fixed output voltage

versions to save the external feedback resistor. It

supports the external loop compensation so that the

stability and transient response can be optimized

at wider VOUT/VIN ranges. It also integrates robust

protection features including output short protection,

output overvoltage protection, and thermal shutdown

protection. The TPS61378-Q1 is available in a 3mm ×

3mm 16-pin QFN package with wettable flank.