参数资料
型号: LTC3729EUH#TRPBF
厂商: Linear Technology
文件页数: 1/30页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 32-QFN
标准包装: 2,500
系列: PolyPhase®
PWM 型: 电流模式
输出数: 1
频率 - 最大: 590kHz
占空比: 99.5%
电源电压: 4 V ~ 36 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 32-WFQFN 裸露焊盘
包装: 带卷 (TR)

LTC3729
FEATURES
550kHz, PolyPhase,
High Efficiency, Synchronous
Step-Down Switching Regulator
DESCRIPTION
Wide V IN Range: 4V to 36V Operation
Reduces Required Input Capacitance and Power
± 1% Output Voltage Accuracy
Phase-Lockable Fixed Frequency: 250kHz to 550kHz
True Remote Sensing Differential Amplifier
PolyPhase ? Extends from Two to Twelve Phases
Reduces the Size and Value of Inductors
Current Mode Control Ensures Current Sharing
1.1MHz Effective Switching Frequency (2?Phase)
OPTI?LOOP ? Compensation Reduces C OUT
Power Good Output Voltage Indicator
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft?Start Current Ramping
Internal Current Foldback Plus Shutdown Timer
Overvoltage Soft?Latch Eliminates Nuisance Trips
Available in 5mm × 5mm QFN
Desktop Computers/Servers
Large Memory Arrays
DC Power Distribution Systems
n
n
Supply Induced Noise
n
n
n
n
n
n
n
n
n
n
n
n
n
n
and 28?Lead SSOP Packages
APPLICATIONS
n
n
n
L , LT, LTC, LTM, PolyPhase, OPTI?LOOP, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
TYPICAL APPLICATION
The LTC ? 3729 is a multiple phase, synchronous
step?down current mode switching regulator controller
that drives N?channel external power MOSFET stages in a
phase?lockable fixed frequency architecture. The PolyPhase
controller drives its two output stages out of phase at
frequencies up to 550kHz to minimize the RMS ripple
currents in both input and output capacitors. The output
clock signal allows expansion for up to 12 evenly phased
controllers for systems requiring 15A to 200A of output
current. The multiple phase technique effectively multiplies
the fundamental frequency by the number of channels
used, improving transient response while operating each
channel at an optimum frequency for efficiency. Thermal
design is also simplified.
An internal differential amplifier provides true remote sens?
ing of the regulated supply’s positive and negative output
terminals as required for high current applications.
A RUN/SS pin provides both soft?start and optional timed,
short?circuit shutdown. Current foldback limits MOSFET
dissipation during short?circuit conditions when the
overcurrent latchoff is disabled. OPTI?LOOP compensation
allows the transient response to be optimized over a wide
range of output capacitance and ESR values. The LTC3729
includes a power good output pin that indicates when the
output is within ± 7.5% of the designed set point.
V IN
TG1
BG1
SENSE1 –
V OS
SENSE2
D1 0.8μH
3.3k
16k
S
S
0.1μF
S
0.1μF
1000pF
16k
LTC3729
BOOST1
SW1
RUN/SS
PGOOD PGND
SENSE1 +
I TH
TG2
SGND BOOST2
SW2
V DIFFOUT BG2
EAIN INTV CC
– +
V OS+ SENSE2 –
10
S
S
S
S
S
0.47μF
0.47μF
S
10μF
M3
M4
× 2
M1
M2
× 2
D2
L2
0.8μH
L1
0.002
0.002
+
10μF
35V
CERAMIC
× 4
C OUT
1000μF × 2
4V
V IN
5V TO 28V
V OUT
1.6V/40A
C OUT : T510E108K004AS
D1, D2: UP5840
L1, L2: CEPH149-IROMC
M1, M3: IRF7811W
M2, M4: IRF7822
3729 TA01
Figure 1. High Current Dual Phase Step-Down Converter
3729fb
1
相关PDF资料
PDF描述
ELL-6PM1R0N COIL PWR CHOKE 1UH 2.7A SMD
LTC3729EUH#TR IC REG CTRLR BUCK PWM CM 32-QFN
SRP1040-R39M INDUCTOR 390NH 24A SMD
SRP1040-R20M INDUCTOR 200NH 32A SMD
SRP1040-8R2M INDUCTOR 8.2UH 5A SMD
相关代理商/技术参数
参数描述
LTC3729LEUH-6 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3729LEUH-6#PBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3729LEUH-6#TR 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3729LEUH-6#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3730CG 功能描述:IC SW REG CTRLR SYNC BUCK 36SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器,Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN(7x7) 包装:管件