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參數(shù)資料
| 型號： | LT3508IFE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.2 A DUAL SWITCHING CONTROLLER, 1060 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 365K |
| 代理商： | LT3508IFE |
LT3508
1
3508f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual Monolithic 1.4A
Step-Down Switching
Regulator
The LT
3508 is a dual current mode PWM step-down
DC/DC converter with internal power switches capable of
generating two 1.4A outputs. The wide input voltage range
of 3.7V to 36V makes the LT3508 suitable for regulating
power from a wide variety of sources, including automo-
tive batteries, 24V industrial supplies and unregulated wall
adapters. Both converters are synchronized to a single os-
cillator programmable up to 2.5MHz and run with opposite
phases, reducing input ripple current. Its high operating
frequency allows the use of small, low cost inductors and
ceramic capacitors, resulting in low, predictable output
ripple. Each regulator has independent tracking and soft-
start circuits and generates a power good signal when its
output is in regulation, easing power supply sequencing
and interfacing with microcontrollers and DSPs.
Cycle-by-cycle current limit, frequency foldback and ther-
mal shutdown provide protection against shorted outputs,
and soft-start eliminates input current surge during start-
up. The low current (<2μA) shutdown mode enables easy
power management in battery-powered systems.
3.3V and 5V Dual Output Step-Down Converter with Output Sequencing
■ Wide Input Voltage Range: 3.7V to 36V
■ Two 1.4A Output Switching Regulators with Internal
Power Switches
■ Adjustable 250kHz to 2.5MHz Switching Frequency
■ Synchronizable over the Full Frequency Range
■ Anti-Phase Switching Reduces Ripple
■ Uses Small Inductors and Ceramic Capacitors
■ Accurate Programmable Undervoltage Lockout
■ Independent Tracking, Soft-Start and Power Good
Circuits Ease Supply Sequencing
■ Output Adjustable Down to 800mV
■ Small 4mm
× 4mm 24-Pin QFN or 16-Pin Thermally
Enhanced TSSOP Surface Mount Packages
■ Automotive
■ DSP Power Supplies
■ Wall Transformer Regulation
■ DSL and Cable Modems
■ PCI Express
VIN
5.6V TO 36V
BOOST2
LT3508
VIN
SHDN
GND
3508 TA01a
RT/SYNC
100pF
10
F
22
F
4.7
F
0.22
F
0.22
F
ON OFF
43k
150pF
51k
10.7k
52.3k
fSW = 700kHz
35.7k
100k
56.2k
11.5k
10
H
6.8
H
POWER
GOOD
OUT2
5V
1.4A
OUT1
3.3V
1.4A
1nF
BOOST1
SW2
SW1
FB2
FB1
VC2
PG1
VC1
TRACK/SS1
PG2
TRACK/SS2
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LOAD CURRENT (A)
0
65
EFFICIENCY
(%)
70
75
80
85
95
0.5
1
3508 TA01b
1.5
90
VIN = 12V
VOUT2 = 5V
VOUT1 = 3.3V
Efciency
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT3508IFE#PBF | 功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT3508IFE#TRPBF | 功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT3508IFEPBF | 制造商:Linear Technology 功能描述:Sw. Regulator Dual 1.4A Step-Down TSSOP |
| LT3508IFE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Monolithic 1.4A Step-Down Switching Regulator |
| LT3508IFE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Monolithic 1.4A Step-Down Switching Regulator |
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