L5988D

批量生产
Design Win

支持同步整流的4 A连续(5 A以上脉冲)步降开关稳压器

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产品概述

描述

The L5988D is a monolithic step down power switching regulator able to deliver a continuous output current of 4 A to the load in most of the application conditions limited only by the thermal performance. The device is able to deliver more than 5 A to the load for a maximum time which is dependent on the thermal impedance of the system and the specific operating conditions).

The input voltage can range from 2.9 V to 18 V. The device is capable of 100% duty cycle operation thanks to the embedded high side PMOS switch which doesn’t need external bootstrap capacitor to be driven.

The internal switching frequency is adjustable by external resistor and can be set continuously from 100 kHz to 1 MHz. The L5988D can also be synchronized to an external frequency signal driven to the SYNCH pin I/O pin.

The multifunction UOS pin allows to set-up properly the additional embedded features depending on the value of the voltage level.

U (UVLO): two UVLO thresholds can be selected to match the 3.3 V and 5 V or 12 V input buses

O (OVP): latched or not latched OVP protection selectable. In latched mode the switching activity is interrupted until an UVLO or INH event happens

S (SINK): the sink capability is always disabled during soft-start time to support pre-biased output voltage. Afterwards the sink capability can be enabled or not depending on the voltage set on the multifunction pin.

During soft-start phase a constant current protection is active to deliver extra current necessary to load the output capacitor. The current limit protection is achieved by sensing the current flowing in both embedded switches to assure an effective protection even at extreme duty cycle operations. Finished the soft-start phase the current protection feature triggers the “HICCUP” mode forcing the soft-start capacitor to be discharged and recharged. The current thresholds of both switches can be adjusted in tracking by using an external resistor to dimension the current protection accordingly to the local application.

The soft-start time is based on a constant current charge of an external capacitor. As a consequence the time can be set accordingly to the value of the output capacitor.

The latest smart power technology BCD6 (Bipolar-CMOS-DMOS version 6) features a low resistance of the embedded switches (35 mΩ typical for a NMOS, 50 mΩ typical for a PMOS), achieving high efficiency levels.

The HTSSOP16 package with exposed pad accomplishes low RthJA (40 °C/W), useful in dissipating power internally generated during high output current / high frequency operations.

  • 所有功能

    • 4 A output current (more than 5 pulsed)
    • Operating input voltage from 2.9 V to 18 V
    • External 1.8 V ± 2% reference voltage
    • Output voltage from 0.6 to input voltage
    • MLCC compatible
    • 200 ns TON
    • Programmable UVLO matches 3.3 V, 5 V and 12 V bus
    • FSW programmable up to 1 MHz
    • Voltage feed forward
    • Zero load current operation
    • Programmable current limit on both switches
    • Programmable sink current capability
    • Pre-bias start up capability
    • Thermal shutdown

电路原理图

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Input Specification
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V
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Output
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Output Power: 0

EDA符号、封装和3D模型

STMicroelectronics - L5988D

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符号

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封装

3D model

3D模型

质量与可靠性

产品型号 Marketing Status 封装 等级规格 符合RoHS级别 材料声明**
L5988D
批量生产
HTSSOP16 工业 Ecopack2
L5988DTR
批量生产
HTSSOP16 工业 Ecopack2

L5988D

Package:

HTSSOP16

Material Declaration**:

Marketing Status

批量生产

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L5988DTR

Package:

HTSSOP16

Material Declaration**:

Marketing Status

批量生产

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

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产品型号
Order from distributors
从ST订购
供货状态
ECCN (US)
ECCN (EU)
包装类型
封装
温度(ºC) Country of Origin
Budgetary Price (US$)*/Qty
最小值
最大值
L5988DTR Available at distributors

经销商的可用性 L5988DTR

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tape and Reel HTSSOP16 -40 150 PHILIPPINES
L5988D Available at distributors

经销商的可用性 L5988D

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tube HTSSOP16 -40 150 PHILIPPINES

L5988DTR 批量生产

封装:
HTSSOP16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L5988DTR

ECCN (EU):

NEC

包装类型:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

PHILIPPINES

代理商名称

代理商库存报告日期:

L5988D 批量生产

封装:
HTSSOP16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L5988D

ECCN (EU):

NEC

包装类型:

Tube

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

PHILIPPINES

Swipe or click the button to explore more details Don't show this again

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商