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參數資料
型號: LTC3835EUFD#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩壓器
英文描述: 3 A SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PQCC20
封裝: 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-20
文件頁數: 1/30頁
文件大小: 1775K
代理商: LTC3835EUFD#PBF
LTC3835
1
3835fd
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Low IQ Synchronous
Step-Down Controller
The LTC3835 is a high performance step-down switching
regulator controller that drives an all N-channel synchro-
nous power MOSFET stage. A constant-frequency current
mode architecture allows a phase-lockable frequency of
up to 650kHz.
The 80A no-load quiescent current extends operating
life in battery powered systems. OPTI-LOOP compensa-
tion allows the transient response to be optimized over
a wide range of output capacitance and ESR values. The
LTC3835 features a precision 0.8V reference and a power
good output indicator. The 4V to 36V input supply range
encompasses a wide range of battery chemistries.
The TRACK/SS pin ramps the output voltage during start-
up.CurrentfoldbacklimitsMOSFETheatdissipationduring
short-circuit conditions.
High Efficiency Synchronous Step-Down Converter
n
Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
n
Low Operating Quiescent Current: 80A
n
OPTI-LOOP Compensation Minimizes COUT
n
±1% Output Voltage Accuracy
n
Wide VIN Range: 4V to 36V Operation
n
Phase-Lockable Fixed Frequency 140kHz to 650kHz
n
Dual N-Channel MOSFET Synchronous Drive
n
Very Low Dropout Operation: 99% Duty Cycle
n
Adjustable Output Voltage Soft-Start or Tracking
n
Output Current Foldback Limiting
n
Power Good Output Voltage Monitor
n
Clock Output for PolyPhase Applications
n
Output Overvoltage Protection
n
Low Shutdown IQ: 10A
n
Internal LDO Powers Gate Drive from VIN or VOUT
n
Selectable Continuous, Pulse-Skipping or
Burst Mode Operation at Light Loads
n
Small 20-Lead TSSOP or 4mm × 5mm QFN Package
n
Automotive Systems
n
Telecom Systems
n
Battery-Operated Digital Devices
n
Distributed DC Power Systems
L
, LT, LTC, LTM, Burst Mode, PolyPhase, OPTI-LOOP, Linear Technology and the Linear logo
are registered trademarks and No RSENSE is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5408150, 5481178, 5705919, 5929620, 6304066, 6498466, 6580258, 6611131.
Comparison of LTC3835 and LTC3835-1
PART #
CLKOUT/
PHASMD
EXTVCC
PGOOD
PACKAGES
LTC3835
YES
FE20/4 × 5 QFN
LTC3835-1
NO
GN16/3 × 5 DFN
VOUT
3.3V
5A
150F
0.01F
VIN
4V TO
36V
ITH
SGND
PLLIN/MODE
VFB
SENSE+
SENSE
CLKOUT
PLLLPF
RUN
PGOOD
TRACK/SS
INTVCC
EXTVCC
BG
PGND
LTC3835
3.3H
0.012
20k
3835 TA01
100pF
330pF
33k
62.5k
4.7F
0.22F
TG
VIN
BOOST
SW
10F
LOAD CURRENT (mA)
EFFICIENCY
(%)
POWER
LOSS
(mW)
0.01 0.1
1
10
100 1000 10000
3835 TA01b
0.001
1
10
1000
100
0.1
100000
10000
40
50
60
70
80
30
20
10
0
90
100
POWER LOSS
EFFICIENCY
VIN = 12V; VOUT = 3.3V
Efficiency and Power Loss
vs Load Current
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相關代理商/技術參數
參數描述
LTC3835IDHC-1#PBF 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數:1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3835IDHC-1#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數:1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3835IFE#PBF 功能描述:IC REG CTRLR BUCK PWM CM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 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: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
LTC3835IFE#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數:1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3835IFEPBF 制造商:Linear Technology 功能描述:DC-DC Controller Step-Down 4-36V TSSOP20
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