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參數(shù)資料
| 型號： | L5989DTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5.06 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | ROHS COMPLIANT, HTSSOP-16 |
| 文件頁數(shù)： | 48/51頁 |
| 文件大?。?/td> | 1947K |
| 代理商： | L5989DTR |
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Description
L5989D
6/51
Doc ID 15778 Rev 3
1
Description
The L5989D is a monolithic step down power switching regulator able to deliver a continuos
output current of 4 A to the load in most of the application conditions limited only by the
thermal performance (see Chapter 6.5 for details). 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 (see Chapter 6.6).
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 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 m
Ω 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L5989D | 5.06 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| L5991D013TR | 1.5 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6258EX | STEPPER MOTOR CONTROLLER, 1.5 A, PDSO36 |
| L6470PD | STEPPER MOTOR CONTROLLER, 7 A, PDSO36 |
| L6566BTR | 0.8 A POWER FACTOR CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L5991 | 功能描述:電流型 PWM 控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L5991_01 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PRIMARY CONTROLLER WITH STANDBY |
| L5991A | 功能描述:電流型 PWM 控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L5991AD | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L5991AD13TR | 功能描述:電流型 PWM 控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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