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

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EDA符号、封装和3D模型

STMicroelectronics - L5988D

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质量与可靠性

产品型号 Marketing Status 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

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L5988DTR
Available at distributors

经销商的可用性 L5988DTR

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L5988D
Available at distributors

经销商的可用性 L5988D

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地区 库存 最小订购量 第三方链接

代理商库存报告日期:

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L5988DTR 批量生产

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产品型号:

L5988DTR

Operating Temperature (°C)

Min:

Max:

代理商名称

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L5988D 批量生产

Budgetary Price (US$)*/Qty:
-
包:
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RoHS:
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ECCN (EU):

产品型号:

L5988D

Operating Temperature (°C)

Min:

Max:

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(*) 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