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| 型号： | LTC1629EG-6#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： | 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 ~ 85°C |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 包装： | 带卷 (TR) |
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LTC1629-6
PolyPhase, Synchronous
Step-Down Switching Regulator
FEATURES
DESCRIPTIO
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Reduces Required Input Capacitance and Power
Supply Induced Noise
True Remote Sensing Differential Amplifier
0.6V, ± 1% Voltage Reference Accuracy
PolyPhase Controller Operates from Two to Twelve
Phases
Current Mode Control Ensures Current Sharing
Phase-Lockable Fixed Frequency: 150kHz to 300kHz
1.8MHz Effective Switching Frequency Capability
OPTI-LOOP ? Compensation Reduces C OUT
Power Good Output Voltage Monitor
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 ? 1629-6 is a PolyPhase TM synchronous stepdown
current mode switching regulator controller with 0.6V
reference 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 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.
A RUN/SS pin provides both soft-start and optional timed,
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 is a registered trademark of Linear Technology Corporation.
PolyPhase is a trademark of Linear Technology Corporation.
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
LTC1629-6 includes a power good output pin that
indicates when the output voltage is inside the ± 10%
tolerance window.
TYPICAL APPLICATIO
0.1 μ F
10 ?
10 μ F × 6
V IN
5V TO 15V
V IN
TG1
BG1
SENSE1 –
TG2
V OS
SENSE2
1.5k
3300pF
S
S
60.4k
S
0.1 μ F
10k
LTC1629-6
BOOST1
SW1
RUN/SS
PGOOD PGND
SENSE1 +
I TH
CLKOUT
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 CER
X5R
M3
M4
× 2
M1
M2
× 2
D2
D1
L2
1 μ H
35V
CERAMIC
0.002 ?
L1
1 μ H
0.002 ?
+
V OUT
0.7V/40A
C OUT
270 μ F × 4
2V
C OUT : T510E108K004AS
D1, D2: UPS840
L1, L2: CEPH149-IROMC-H
M1, M3: Si7840DP
M2, M4: Si7440DP
1629 TA01
Figure 1. High Current Dual Phase Step-Down Converter
16296f
1
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相关代理商/技术参数 |
参数描述 |
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| LTC1629IG | 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 |
| LTC1629IG#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® 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 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:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LTC1629IG#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 |
| LTC1629IG#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 |
| LTC1629IGPBF | 制造商:Linear Technology 功能描述:DC-DC Controller Step-Down 4-36V SSOP28 |
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