Datasheet > LM3668-Q1

LM3668-Q1

更新时间： 2024-09-27 01:11:35

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
24页	1557K
描述
1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter

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LM3668-Q1

SNVSA84A –APRIL 2015–REVISED MAY 2015

LM3668-Q1 1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter

1 Features

2 Applications

•

45-µA Typical Quiescent Current

Output Voltage Option 4.5 V or 5 V

•

Automotive Radar

Automotive Camera

Automotive Lidar

–

1-A Maximum Load Current for

V_IN= 3.9 V to 5.5 V

3 Description

800-mA Maximum Load Current for

V_IN= 3.4 V to 3.8 V

The LM3668-Q1 is a synchronous buck-boost DC-DC

converter optimized for automotive requirements and

input voltage rails between 2.7 V and 5.5 V. It has the

capability to support up to 1-A output current over the

output voltage range. The LM3668-Q1 regulates the

output voltage over the complete input voltage range

by automatically switching between buck or boost

modes depending on the input voltage.

700-mA Maximum Load Current for

V_IN= 3 V to 3.3 V

600-mA Maximum Load Current for

V_IN= 2.7 V to 2.9 V

•

2.2-MHz PWM Fixed Switching Frequency

(Typical)

The LM3668-Q1 has 2 N-channel MOSFETS and 2

P-channel MOSFETS arranged in a topology that

provides continuous operation through the buck and

boost operating modes. There is a MODE pin that

allows the user to choose between an intelligent

automatic PFM-PWM mode operation and forced

Automatic PFM-PWM Mode or Forced PWM

Mode

•

Wide Input Voltage Range: 2.7 V to 5.5 V

Internal Synchronous Rectification for High

Efficiency

PWM operation. During PWM mode,

a fixed-

•

Internal Soft Start: 600-µs Maximum Start-Up

Time After V_INSettled

frequency 2.2 MHz (typical) is used. PWM mode

drives load up to 1 A. Hysteretic PFM mode extends

the battery life through reduction of the quiescent

current to 45 µA (typical) at light loads during system

standby. Internal synchronous rectification provides

high efficiency. In shutdown mode (EN pin pulled

low), the device turns off and reduces battery

consumption to 0.01 µA (typical).

•

0.01-µA Typical Shutdown Current

Current Overload and Thermal Shutdown

Protection

•

Frequency Sync Pin: 1.6 MHz to 2.7 MHz

Typical Application Circuit

V_IN= 2.7 V ꢀ 5.5 V

A high switching frequency of 2.2 MHz (typical)

allows the use of tiny surface-mount components

including a 2.2-µH inductor, a 10-µF input capacitor,

and a 22-µF output capacitor.

10 µF

VDD

PVIN

4.5 V/5 V

VOUT

SW1

Device Information⁽¹⁾

LM3668-Q1

22 µF

2.2 µH

SW2

SYNC/MODE

PART NUMBER

PACKAGE

BODY SIZE (NOM)

VSEL

L = 4.5 V

H = 5 V

LM3668-Q1

WSON (12)

4.00 mm x 4.00 mm

SGND

PGND

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...24

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与LM3668-Q1相关器件

型号	品牌	获取价格	描述	数据表
LM3668-Q1_15	TI	获取价格	1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668QDNTRQ1	TI	获取价格	1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668SD-2833	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668SD-2833/NOPB	TI	获取价格	1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668SD-3.3	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668SD-3034	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668SD-3034/NOPB	TI	获取价格	1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668SD-4550	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668SD-4550/NOPB	TI	获取价格	1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668SDX-2833	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter

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