參數(shù)資料
型號： LTC3731HG
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller
中文描述： 5 A SWITCHING CONTROLLER, 750 kHz SWITCHING FREQ-MAX, PDSO36
封裝： 5.3 MM, PLASTIC, SSOP-36
文件頁數(shù)： 1/32頁
文件大?。?/td> 323K
代理商： LTC3731HG
1
LTC3731H
3731hf
APPLICATIU
TYPICAL APPLICATIO
U
FEATURES
DESCRIPTIO
The LTC
3731H is a PolyPhase
synchronous step-down
switching regulator controller that drives all N-channel
external power MOSFET stages in a phase-lockable fixed
frequency architecture. The LTC3731H is rated for opera-
tion up to 140
°
C junction temperature. The 3-phase con-
troller drives its output stages with 120
°
phase separation
at frequencies up to 600kHz per phase to minimize the
RMS current losses in both the input and output filter
capacitors. 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 exter-
nal MOSFETs under short-circuit or overload conditions.
Please refer to the LTC3731 data sheet for 0
°
C to 70
°
C and
–40
°
C to 85
°
C rated versions.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
Burst Mode, OPTI-LOOP and PolyPhase are registered trademarks of Linear Technology
Corporation. Stage Shedding is a trademark of Linear Technology Corporation.
Protected by U.S. Patents including 5481178, 5929620, 6177787, 6144194, 6100678,
5408150, 6580258, 6462525, 6304066, 5705919.
■
3-Phase Current Mode Controller with Onboard
MOSFET Drivers
■
±
5% Output Current Matching Optimizes Thermal
Performance and Size of Inductors and MOSFETs
■
±
2% V
REF
Accuracy Over Temperature up to 140
°
C
■
Reduced Power Supply Induced Noise
■
±
10% Power Good Output Indicator
■
250kHz to 600kHz Per Phase, PLL, Fixed Frequency
■
PWM, Stage Shedding
TM
or Burst Mode
Operation
■
OPTI-LOOP
Compensation Minimizes C
OUT
■
Adjustable Soft-Start Current Ramping
■
Short-Circuit Shutdown Timer with Defeat Option
■
Overvoltage Soft Latch
■
Adjustable Undervoltage Lockout Threshold
■
Selectable Phase Output for Up to 12-Phase Operation
■
Available in 36-Pin Narrow (0.209") SSOP Package
■
Automotive and Industrial Power Supplies
■
High Output Current DC/DC Power Supplies
Figure 1. High Current Triple Phase Step-Down Converter
V
IN
0.003
0.8
μ
H
22
μ
F
35V
0.003
0.8
μ
H
V
IN
0.003
C
OUT
470
μ
F
4V
V
1.35V
55A
V
5V TO 28V
0.8
μ
H
V
IN
3731H F01
TG1
V
CC
0.1
μ
F
SW3 SW2 SW1
SW1
BG1
SENSE1
+
SENSE1
–
BOOST1
BOOST2
BOOST3
TG2
SW2
BG2
PGND
PGOOD
PLLIN
PLLFLTR
I
TH
RUN/SS
0.01
μ
F
680pF
5k
OPTIONAL SYNC IN
POWER GOOD INDICATOR
SGND
EAIN
UVADJ
SENSE2
+
SENSE2
–
TG3
SW3
BG3
SENSE3
+
SENSE3
–
+
10
μ
F
V
CC
4.5V TO 7V
+
LTC3731H
36k
12k
7.5k
100pF
6.04k
3-Phase, 600kHz,
Synchronous Buck Switching
Regulator Controller
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3731HG#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® 標準包裝: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
LTC3731HG#TR 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標準包裝: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
LTC3731HG#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® 標準包裝: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
LTC3731HUH#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® 標準包裝: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
LTC3731HUH#TRPBF 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® 標準包裝: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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