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參數(shù)資料
| 型號： | LTC3125EDCB#TRMPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 292K |
| 代理商： | LTC3125EDCB#TRMPBF |
LTC3125
6
3125f
PIN FUNCTIONS
GND (Pin 1): Signal Ground.
FB (Pin 2): Feedback Input to the Error Amplier. Connect
the resistor divider tap to this pin. The top of the divider
connects to VOUT and the bottom of the divider connects
to GND. The output voltage can be adjusted from 1.8V
to 5.25V.
PROG (Pin 3): Programming Input for Average Input
Current. This pin should be connected to ground through
an external resistor (RPROG) to set input average current
limit threshold. PROG pin gain = 22.1kΩ-A/A. The average
input current limit threshold is set by RPROG according
to the following:
R
k
Desired I
A
PROG
AVG
=
22 1
.
()
Ω-A
VIN (Pin 4): Input Voltage. The device is powered from VIN
until VOUT exceeds VIN. Once VOUT is greater than (VIN +
0.25V), the device is powered from VOUT. Place a ceramic
bypass capacitor from VIN to GND. A minimum value of
1μF is recommended. Also connects to CS through 60mΩ
internal sense resistor.
CS (Pin 5): Current Sense Resistor Connection Point.
Connect the inductor directly to CS. An internal 60mΩ
sense resistor is connected between CS and VIN.
SHDN (Pin 6): Logic Controlled Shutdown Input. Bringing
this pin above 1V enables the part, forcing this pin below
0.35V disables the part.
VOUT (Pin 7): Output Voltage Sense and the Output of the
Synchronous Rectier. Connect the output lter capaci-
tor from VOUT to GND, close to the IC. A minimum value
of 10μF ceramic is recommended. Due to the output
disconnect feature, VOUT is disconnected from VIN when
SHDN is low.
SW (Pin 8): Switch Pin. Connect an inductor from this
pin to CS. An internal anti-ringing resistor is connected
across SW and CS after the inductor current has dropped
near zero.
Exposed Pad (Pin 9): Power Ground. This pin must be
soldered to the PCB ground plane.
TYPICAL PERFORMANCE CHARACTERISTICS (T
A = 25°C unless otherwise noted)
VOUT and IIN During Soft-Start
VOUT
2V/DIV
SHDN
5V/DIV
INPUT
CURRENT
200mA/DIV
2s/DIV
VIN = 3.3V
VOUT = 4.5V
COUT = 1F
L = 2.7μH
3125 G20
Efciency vs VIN
VIN (V)
2
50
EFFICIENCY
(%)
60
65
70
75
80
85
3
4
3125 G21
90
95
100
55
5
ILOAD = 200mA
VOUT = 3.8V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3125EDCB-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.2A Synchronous Step-Up DC/DC Converter with Input Current Limit |
| LTC3127 | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:40V, 2A Synchronous Buck-Boost DC/DC Converter |
| LTC3127EDD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1A Buck-Boost DC/DC Converter with Programmable Input Current Limit |
| LTC3127EDD#PBF | 功能描述:IC BUCK BOOST SYNC ADJ 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:熱電冷卻器 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.173"，4.40mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:28-TSSOP 裸露焊盤 包裝:管件 產(chǎn)品目錄頁面:1410 (CN2011-ZH PDF) |
| LTC3127EDD#PBF | 制造商:Linear Technology 功能描述:BUCK-BOOST DC/DC CONVERTER IC |
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