參數(shù)資料
型號(hào)： LTC3731HUH#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 5 A SWITCHING CONTROLLER, 750 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32
文件頁數(shù)： 1/34頁
文件大?。?/td> 427K
代理商： LTC3731HUH#TRPBF
LTC3731H
3731Hfb
Typical applicaTion
FeaTures
DescripTion
3-Phase, 600kHz,
Synchronous Buck Switching
Regulator Controller
The LTC3731H is a PolyPhase synchronous step-down
switching regulator controller that drives all N-channel
external power MOSFET stages in a phase-lockable fixed
frequencyarchitecture.TheLTC3731Hisratedforoperation
up to 140°C junction temperature. The 3-phase controller
drives its output stages with 120° phase separation at
frequencies up to 680kHz per phase to minimize the RMS
currentlossesinboththeinputandoutputfiltercapacitors.
The 3-phase technique effectively triples the fundamental
frequency, improving transient response while operating
each controller at an optimal frequency for efficiency and
ease of thermal design. Light load efficiency is optimized
by using a choice of output Stage Shedding or Burst Mode
operation.
The precision reference supports output voltages from
0.6V to 6V. Current foldback provides protection for the
external MOSFETs under short-circuit or overload condi-
tions. Please refer to the LTC3731 data sheet for 0°C to
70°C and –40°C to 85°C rated versions.
L
, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, OPTI-LOOP and PolyPhase
are registered trademarks and Stage Shedding is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5481178, 5929620, 6177787, 6144194, 6100678, 5408150, 6580258, 6462525,
6304066, 5705919.
Figure 1. High Current Triple Phase Step-Down Converter
applicaTions
n
3-Phase Current Mode Controller with Onboard
MOSFET Drivers
n
±5% Output Current Matching Optimizes Thermal
Performance and Size of Inductors and MOSFETs
n
±2% VREF Accuracy Over Temperature Up to 140°C
n
Reduced Power Supply Induced Noise
n
±10% Power Good Output Indicator
n
225kHz to 680kHz Per Phase, PLL, Fixed Frequency
n
PWM, Stage Shedding or Burst Mode Operation
n
OPTI-LOOP Compensation Minimizes COUT
n
Adjustable Soft-Start Current Ramping
n
Short-Circuit Shutdown Timer with Defeat Option
n
Overvoltage Soft Latch
n
Adjustable Undervoltage Lockout Threshold
n
Selectable Phase Output for Up to 12-Phase
Operation
n
Available in 36-Pin Narrow (0.209") SSOP and
5mm
× 5mm QFN Packages
n
Automotive and Industrial Power Supplies
n
High Output Current DC/DC Power Supplies
VIN
0.003
0.8H
22F
35V
0.003
0.8H
VIN
0.003
COUT
470F
4V
VOUT
1.35V
55A
VIN
5V TO 28V
0.8H
VIN
3731H F01
TG1
VCC
0.1F
SW3 SW2 SW1
SW1
BG1
SENSE1+
SENSE1–
BOOST1
BOOST2
BOOST3
TG2
SW2
BG2
PGOOD
PLLIN
PLLFLTR
ITH
0.01F
680pF
5k
OPTIONAL SYNC IN
POWER GOOD INDICATOR
RUN/SS
SGND
EAIN
PGND
UVADJ
SENSE2+
SENSE2–
TG3
SW3
BG3
SENSE3+
SENSE3–
+
10F
VCC
4.5V TO 7V
+
LTC3731H
36k
12k
7.5k
100pF
6.04k
Efficiency vs IOUT
EFFICIENCY
(%)
0.1
LOAD CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
1
10
100
3731H F01b
VIN = 8V
VOUT = 1.5V
VFCB = OPEN
VFCB = 5V
VFCB = 0V
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PDF描述
LTC3731HUH#PBF 5 A SWITCHING CONTROLLER, 750 kHz SWITCHING FREQ-MAX, PQCC32
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3731IG 制造商:Linear Technology 功能描述:LDO Cntrlr SYNC BUCK REG 0.6V to 6V 36-Pin SSOP
LTC3731IG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):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
LTC3731IG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):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
LTC3731IUH 制造商:Linear Technology 功能描述:LDO Cntrlr SYNC BUCK REG 0.6V to 6V 32-Pin QFN EP
LTC3731IUH#PBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):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
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