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參數(shù)資料
| 型號： | LT1619 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Low Voltage Current Mode PWM Controller |
| 中文描述： | 低電壓電流模式PWM控制器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 256K |
| 代理商： | LT1619 |
1
LT1619
1619fa
Low Voltage Current Mode
PWM Controller
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
The LT
1619 is a fixed frequency PWM controller for
implementing current mode DC/DC converters with mini-
mum external parts. The LT1619 operates with input
voltages ranging from 1.9V to 18V and is suitable for a
variety of battery-powered and distributed DC/DC con-
verters. The internal rail-to-rail N-channel MOSFET driver
operates either from the input in the nonbootstrapped
mode or from the output in bootstrapped operation. The
driver is designed to drive a low side power transistor in
boost, SEPIC, flyback and other topologies.
Converter efficiency is improved at heavy loads with a
53mV current sense voltage and at light load with Burst
Mode operation. The operating frequency is internally set
at 300kHz. The oscillator can also be synchronized exter-
nally up to 500kHz. No load quiescent current is 140
μ
A and
shutdown current is 15
μ
A.
The LT1619 is available in 8-lead MSOP and SO packages.
I
Wide V
IN
Range: 1.9V to 18V
I
300kHz Fixed Frequency Current Mode Control
I
1A Rail-to-Rail N-Channel MOSFET Driver
I
Low 53mV Current Limit Threshold Voltage
Improves Efficiency
I
Implements Boost, SEPIC and Flyback Converters
Requiring Low Side Power Transistors
I
Internal Current Sense Amplifier
with Leading Edge Blanking
I
Up to 500kHz External Synchronization
I
Burst Mode
Operation for High Efficiency
at Light Load
I
140
μ
A Quiescent Current
I
15
μ
A Shutdown Current
I
8-Lead MSOP and SO Packages
I
3.3V to 5V DC/DC Converters
I
Distributed Power Supplies
I
Isolated Power Supplies
Figure 1. High Efficiency 3.3V to 5V DC/DC Converter
LOAD CURRENT (mA)
75
E
80
85
90
95
1
100
1000
1619 F01a
70
10
Efficiency
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
+
0.1
μ
F
0.1
μ
F
15nF
220pF
V
3.3V
L1
5.6
μ
H
5A
D1
M1
Si9804
V
OUT
5V
2.2A
R
SENSE
0.01
1619 F01
75k
37.4k
12.4k
C1
22
μ
F
C1: PANASONIC EEFCDOK220R
C
OUT
: KEMET T495X227K010AS (
×
2)
D1: MBRD835L
L1: COILCRAFT DO5022P-562
+
C
OUT
440
μ
F
S/S
FB
V
C
GND
8
7
6
5
1
2
3
4
V
IN
DRV
GATE
SENSE
LT1619
相關PDF資料 |
PDF描述 |
|---|---|
| LT1619ES8 | Low Voltage Current Mode PWM Controller |
| LT1619EMS8 | Low Voltage Current Mode PWM Controller |
| LT1620CS8 | Rail-to-Rail Current Sense Amplifier |
| LT1620IGN | CAP 0.1UF 200V 10% X7R SMD-1206 TR-7 PLATED-NI/SN |
| LT1621IGN | Rail-to-Rail Current Sense Amplifier |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1619EMS8 | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1619EMS8#PBF | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LT1619EMS8#TR | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1619EMS8#TRPBF | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1619EMS8PBF | 制造商:Linear Technology 功能描述:PWM Controller Current Mode 1.5A MSOP8 |
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