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參數資料
| 型號： | LT3689HMSE-5#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.95 A SWITCHING REGULATOR, 2160 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件頁數： | 1/32頁 |
| 文件大小： | 2188K |
| 代理商： | LT3689HMSE-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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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT3689HMSE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:700mA Step-Down Regulator with Power-On Reset and Watchdog Timer |
| LT3689HMSE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:700mA Step-Down Regulator with Power-On Reset and Watchdog Timer |
| LT3689IMSE#PBF | 功能描述:IC REG BUCK ADJ 0.7A 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 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: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 |
| LT3689IMSE#TRPBF | 功能描述:IC REG BUCK ADJ 0.7A 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 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: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 |
| LT3689IMSE-5#PBF | 功能描述:IC REG BUCK 5V 0.7A 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 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: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 |
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