参数资料
型号: LTC1629CG#TRPBF
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 28-SSOP
标准包装: 2,000
系列: PolyPhase®
PWM 型: 电流模式
输出数: 1
频率 - 最大: 360kHz
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: 0°C ~ 85°C
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
包装: 带卷 (TR)
LTC1629/LTC1629-PG
PolyPhase, High Efficiency,
Synchronous Step-Down Switching Regulators
FEATURES
DESCRIPTIO
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Dual Controller Operates from One to Twelve Phases
Reduces Required Input Capacitance and Power
Supply Induced Noise
Current Mode Control Ensures Current Sharing
Phase-Lockable Fixed Frequency: 150kHz to 300kHz
1.8MHz Effective Switching Frequency
True Remote Sensing Differential Amplifier
OPTI-LOOP TM Compensation Reduces C OUT
± 1% Output Voltage Accuracy
Power Good Output Voltage Monitor (LTC1629-PG)
Wide V IN Range: 4V to 36V Operation
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft-Start Current Ramping
Internal Current Foldback Plus Shutdown Timer
Overvoltage Soft-Latch Eliminates Nuisance Trips
Micropower Shutdown
Available in 28-Lead SSOP Package
The LTC ? 1629/LTC1629-PG are multiple phase, dual,
synchronous step-down current mode switching regula-
tor controllers that drive N-channel external power MOSFET
stages in a phase-lockable fixed frequency architecture.
The PolyPhase TM controller drives its two output stages
out of phase at frequencies up to 300kHz 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
sensing of the regulated supply’s positive and negative
output terminals as required for high current applications.
Desktop Computers
Internet Servers
Large Memory Arrays
DC Power Distribution Systems
APPLICATIO  S
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, LTC and LT are registered trademarks of Linear Technology Corporation.
OPTI-LOOP and PolyPhase are trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
10 ?
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 compensa-
tion allows the transient response to be optimized over a
wide range of output capacitance and ESR values. The
LTC1629-PG includes a power good output pin that re-
places the AMPMD control pin of the LTC1629.
V IN
0.1 μ F
10 μ F × 4
5V TO 28V
BG1
SENSE1 –
SENSE2 +
V OS
3.3k
1000pF
S
S
16k
S
0.1 μ F
16k
V IN LTC1629-PG TG1
BOOST1
SW1
RUN/SS
PGOOD PGND
SENSE1 +
I TH
TG2
SGND BOOST2
SW2
V DIFFOUT BG2
EAIN INTV CC
V OS + SENSE2 –
S
S
S
S
S
0.47 μ F
0.47 μ F
S
10 μ F
M3
M4
× 2
M1
M2
× 2
D2
D1
L2
1 μ H
35V
CERAMIC
L1
1 μ H
0.003 ?
0.003 ?
+
V OUT
1.6V/40A
C OUT
1000 μ F × 2
4V
C OUT : T510E108K004AS
D1, D2: UP5840
L1, L2: CEPH149-IROMC
M1, M3: IRF7811
M2, M4: IRF7809
1629 TA01
Figure 1. High Current Dual Phase Step-Down Converter
1
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LTC1629EG-6#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP(0.173",4.40mm 宽) 包装:带卷 (TR)
LTC1629EG-6#TR 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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
LTC1629EG-6#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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
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