参数资料
型号: LT3694EFE-1#TRPBF
厂商: Linear Technology
文件页数: 1/28页
文件大小: 338K
描述: IC REG TRPL BUCK/LINEAR 20TSSOP
标准包装: 2,500
拓扑: 降压(降压)(1),线性(LDO)(2)
功能: 任何功能
输出数: 3
频率 - 开关: 250kHz ~ 2.5MHz
电压/电流 - 输出 1: 0.75 V ~ 16 V,2.6A
电压/电流 - 输出 2: 控制器
电压/电流 - 输出 3: 控制器
带 LED 驱动器:
带监控器:
带序列发生器:
电源电压: 4 V ~ 36 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)裸露焊盘
供应商设备封装: 20-TSSOP-EP
包装: 带卷 (TR)
LT3694/LT3694-1
1
36941fb
TYPICAL APPLICATION
DESCRIPTION
36V, 2.6A Monolithic Buck
Regulator With Dual LDO
The LT
?/DIV>
3694/LT3694-1 are monolithic, current mode
DC/DC converters with dual, low dropout regulator con-
trollers. The switching converter is a step-down converter
capable of generating up to 2.6A at its output. Each regu-
lator has independent track/soft-start circuits simplifying
power supply sequencing and interfacing with micro-
controllers and DSPs.
The switching frequency is set with a single resistor with a
range of 250kHz to 2.5MHz. The high switching frequency
permits the use of small inductors and ceramic capacitors
leading to very small triple output solutions. The constant-
switching frequency, combined with low impedance ce-
ramic capacitors, results in low, predictable output ripple.
Protection circuitry senses the current in the power switch
and external Schottky catch diode to protect the LT3694
against short-circuit conditions. Frequency foldback and
thermal shutdown provide additional protection.
With its wide input voltage range of 4V to 36V, the LT3694
regulates a broad array of power sources from 4-cell batteries
and 5V logic rails to unregulated wall transformers, lead acid
batteries and distributed power supplies. The LT3694 can be
synchronized to an external clock with the SYNC pin while
the LT3694-1 offers a CLKOUT pin allowing other DC/DC
converters to synchronize to the LT3694-1 clock.
FEATURES
APPLICATIONS
n
 Wide Input Range: 4V to 36V
n
 Overvoltage Shutdown Protects Circuit Through  
70V Transients
n
 2.6A Output Switching Regulator with Internal 
Power Switch
n
 Dual, Low Dropout, Linear Regulator Controllers 
with Programmable Current Limit
n
 Tracking/Soft-Start Inputs and Power Good Output
Simplify Soft-Start and Supply Sequencing
n
 Uses Small Inductors and Ceramic Capacitors
n
 V
OUT(MIN)
 = 0.75V (Buck and LDOs)
n
 Adjustable 250kHz to 2.5MHz Switching Frequency
n
 Accurate Enable Threshold Allows User
Programmable Undervoltage Lockout
n
 Options for Clock Synchronization (LT3694) or Clock
Output to Enable Synchronization to Other Switching
Regulators (LT3694-1)
n
 Thermally Enhanced 28-Lead 4mm ?5mm QFN and
20-Lead TSSOP Packages
n
 Automotive
n
 Industrial
n
 DSL and Cable Modems
n
 Distributed Power Regulation
n
 Wall Transformer Regulation
SW
FB3
PGOOD
RT
FB2
SYNC
V
IN
V
C1
BIAS
V
IN
4.5V TO 36V
f
SW
 = 800kHz
GND
LT3694
36941 TA01a
TRK/SS1
TRK/SS2
TRK/SS3
LIM2
DRV2
DA
FB1
LIM3
DRV3
EN/UVLO
BST
OUT1
3.3V
1.7A
OUT3
1.8V
450mA
OUT2
2.5V
450mA
47礔
34k
B340A
4.7礖
0.22礔
10k
OUT1
OUT1
41.2k
15.4k
24.9k
10.7k
51.1k
11k
2.2礔
4.7礔
2.2礔
1nF
0.1
0.1
330pF
Efficiency at V
OUT
 = 3.3V
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective owners.
90
80
70
60
50
100
I
OUT
 (A)
0
1
2
3
36941 TA01b
V
IN
 = 4.5V
V
IN
 = 12V
V
IN
 = 36V
f
SW
 = 800kHz
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LT3694EFEPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 2.6A Monolithic Buck Regulator With Dual LDO
LT3694EUFD#PBF 功能描述:IC REG TRPL BUCK/LINEAR 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LT3694EUFD#TRPBF 功能描述:IC REG TRPL BUCK/LINEAR 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LT3694EUFD-1#PBF 功能描述:IC REG TRPL BUCK/LINEAR 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LT3694EUFD-1#TRPBF 功能描述:IC REG TRPL BUCK/LINEAR 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*