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参数资料
| 型号： | LT3689IUD-5#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.95 A SWITCHING REGULATOR, 2160 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件页数： | 1/32页 |
| 文件大小： | 2188K |
| 代理商： | LT3689IUD-5#TRPBF |
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LT3689/LT3689-5
1
3689fd
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
700mA Step-Down
Regulator with Power-On Reset
and Watchdog Timer
TheLT3689isanadjustablefrequency(350kHzto2.2MHz)
monolithicstep-downswitchingregulatorwithapower-on
reset and watchdog timer. The regulator operates from
inputs up to 36V and withstands transients up to 60V. Low
ripple Burst Mode operation maintains high efficiency at
lowoutputcurrentwhilekeepingoutputripplebelow15mV
in a typical application, with input quiescent current of just
85A. Shutdown circuitry reduces input supply current to
less than 1A while EN/UVLO is pulled low. Using a resis-
tor divider on the EN/UVLO pin provides a programmable
undervoltage lockout. Current limit, frequency foldback
and thermal shutdown provide fault protection.
The reset and watchdog timeout periods are indepen-
dentlyadjustableusingexternalcapacitors.Tightaccuracy
specifications and glitch immunity ensure reliable reset
operation of a system without false triggering. The open
collector RST will pull down if output voltage drops 10%
below the programmed value. The watchdog timer is
pin-selectable for window or timeout modes. In timeout
mode, WDO pulls low if too long of a period passes before
a watchdog transition is detected. In window mode, the
LT3689 monitors for WDI falling edges grouped too close
together or too far apart.
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.
3.3V Regulator with Power-On Reset Timer and Watchdog Timer
n
Wide Input Range:
Operation from 3.6V to 36V
Overvoltage Lockout Protects Circuits through
60V Transients
n
85A IQ at 12VIN to 3.3VOUT
n
Low Ripple Burst Mode Operation Allows Output
Ripple <15mVP-P
n
Programmable, Defeatable Watchdog Timer with
Window or Timeout Control
n
Programmable Power-On Reset Timer (POR)
n
Synchronizable, Adjustable 350kHz to 2.2MHz
Switching Frequency
n
700mA Output Switching Regulator with Internal
Power Switch
n
Fixed 5V or Adjustable Output Voltage
n
800mV Feedback Voltage
n
Programmable Input Undervoltage Lockout with
Hysteresis
n
16-Pin 3mm × 3mm QFN and 16-Pin MSOP Packages
n
Automotive Electronic Control Units
n
Industrial Power Supplies
SW
I/O
RESET
DA
FB
RT
SYNC
fSW = 700kHz
WDI
RST
WDO
VIN
P
EN/UVLO
VIN
4.5V TO 36V
TRANSIENT TO 60V
3.3V
700mA
100k
CWDT
10nF
tWDU = 182ms
tWDL = 5.9ms
12H
10pF
22F
0.1F
316k
GND
20.5k
LT3689
3689 TA01
BST
OUT
CPOR
CWDT
2.2F
CPOR
68nF
tRST = 157ms
Efficiency
LOAD CURRENT (A)
EFFICIENCY
(%)
POWER
LOSS
(mW)
0.0001
0.01
0.1
1
0.001
3689 TA01b
VIN = 12V
VOUT = 3.3V
f = 700kHz
L = 12H
TA = 25°C
40
50
60
70
80
30
20
10
0
90
100
10
1
1000
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PDF描述 |
|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3689IUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:700mA Step-Down Regulator with Power-On Reset and Watchdog Timer |
| LT3689IUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:700mA Step-Down Regulator with Power-On Reset and Watchdog Timer |
| LT3690 | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator |
| LT3690EUFE#PBF | 功能描述:IC REG BUCK SYNC ADJ 4A 26QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3690EUFE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 4A 26QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
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