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L5988D 데이터시트 PDF




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부품번호 L5988D 기능
기능 4A continuous (more than 5 A pulsed) step-down switching regulator
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L5988D 데이터시트, 핀배열, 회로
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L5988D
4 A continuous (more than 5 A pulsed) step-down switching
regulator with synchronous rectification
Preliminary Data
Features
I 4 A output current (more than 5 pulsed)
I Operating input voltage from 2.9 V to 18 V
I External 1.8 V ± 2 % reference voltage
I Output voltage from 0.6 to input voltage
I MLCC compatible
I 200 ns TON
I Programmable UVLO matches 3.3 V, 5 V and
12 V bus
I FSW programmable up to 1 MHz
I Voltage feed-forward
I Zero-load current operation
I Programmable current limit on both switches
I Programmable sink current capability
I Pre-bias start up capability
I Thermal shutdown
HTSSOP 16
Applications
I Consumer: STB, DVD, LCD TV, VCR, car
radio, LCD monitors
I Networking: XDSL, modems, routers and
switches
I Computer and peripherals: printers, audio /
graphic cards, optical storage, hard disk drive
I Industrial: DC-DC modules, factory automation
Figure 1. Test application circuit
January 2009
Rev 1
This is preliminary information on a new product now in development or undergoing evaluation.
Details are subject to change without notice.
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L5988D pdf, 반도체, 판매, 대치품
www.DataSLhiesett4oUf.ctoamble
List of table
L5988D
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Pinout description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
A/D voltage windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
UOS voltage biasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
FSW resistor examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ILIM-ADJ resistor examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Input capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Output capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Component list application circuit (fSW = 400 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Component list application circuit (fSW = 600 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
HTSSOP16 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
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L5988D 전자부품, 판매, 대치품
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2 Pin function
Figure 2. Pin connection
Pin function
Table 1.
N.
1, 16
2, 3
4
5
6
7
8
9
10
11
12
13
14, 15
Pinout description
Name
Description
OUT Regulator output
VIN
VCC
SS/INH
Unregulated DC input voltage
Unregulated DC signal input voltage
An external logic signal (active LOW) disables the device. In case the pin is
floating the device deliver a constant current (22 A typ.) to charge the
soft-start capacitor (see 5.4)
COMP Error amplifier output for frequency compensation
ILIM-ADJ
Connecting a pull-up resistor to VREF or a pull-down resistor to GND the
internal current limit thresholds can be tuned to match the local application.
In case the pin is left floating no changes are applied to the default current
limit thresholds
FB
SYNCH
FSW
U/O/S
Feedback input. Connecting the output voltage directly to this pin results in
a regulation voltage of 600 mV. An external resistive divider is required for
higher output voltages
Master/slave synchronization
Connecting a pull-up resistor to VREF or a pull-down resistor to GND the
internal oscillator frequency will be increased or decreased respectively. In
case the pin is left floating the predefined oscillator frequency
(400 kHz ± 10%) is active
Multifunction pin used to program additional features: UVLO thresholds,
OVP latched/not latched, SINK enabled/disabled
VREF
SGND
PGND
1.8 V voltage reference
Signal ground
Power ground
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구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

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광범위한 전력 반도체를 판매합니다.

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상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
L5988

4A step-down switching regulator

STMicroelectronics
STMicroelectronics
L5988D

4A continuous (more than 5 A pulsed) step-down switching regulator

ST Microelectronics
ST Microelectronics

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