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参数资料
| 型号： | LTC3860EUH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 32-QFN |
| 标准包装： | 73 |
| 系列： | PolyPhase® |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1.25MHz |
| 占空比： | 91.5% |
| 电源电压： | 3 V ~ 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： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
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LTC3860
Dual, Multiphase Step-Down
Voltage Mode DC/DC Controller
with Current Sharing
FEATURES
DESCRIPTION
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Operates with Power Blocks, DRMOS or External
Gate Drivers and MOSFETs
Constant Frequency Voltage Mode Control with
Accurate Current Sharing
±0.75% 0.6V Voltage Reference
Differential Remote Output Voltage Sense Ampli?er
Multiphase Capability—Up to 12-Phase Operation
Programmable Current Limit
Safely Powers a Prebiased Load
Programmable or PLL-Synchronizable Switching
Frequency Up to 1.25MHz
Lossless Current Sensing Using Inductor DCR or
Precision Current Sensing with Sense Resistor
V CC Range: 3V to 5.5V
V IN Range: 3V to 24V
Power Good Output Voltage Monitor
Output Voltage Tracking Capability
Programmable Soft-Start
Available in a 32- Pin 5mm × 5mm QFN Package
The LTC ? 3860 is a dual, PolyPhase ? synchronous step-
down switching regulator controller for high current
distributed power systems, digital signal processors, and
other telecom and industrial DC/DC power supplies. It uses
a constant frequency voltage mode architecture combined
with very low offset, high bandwidth error ampli?ers and
a remote output sense differential ampli?er for excellent
transient response and output regulation.
The controller incorporates lossless inductor DCR current
sensing to maintain current balance between phases and to
provide overcurrent protection. The chip operates from a
V CC supply between 3V and 5.5V and is designed for step-
down conversion from V IN between 3V and 24V to output
voltages between 0.6V and V CC – 0.5V.
The TRACK/SS pins provide programmable soft-start or
tracking functions. Inductor current reversal is disabled
during soft-start to safely power prebiased loads. The con-
stant operating frequency can be synchronized to an exter-
APPLICATIONS
nal clock or linearly programmed from 250kHz to 1.25MHz.
Up to six LTC3860 controllers can operate in parallel for
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High Current Distributed Power Systems
Digital Signal Processor and ASIC Supplies
Telecom Systems
Industrial Power Supplies
1-, 2-, 3-, 4-, 6- or 12-phase operation.
The LTC3860 is available in a 32-pin 5mm × 5mm QFN
package.
L , LT, LTC, LTM, PolyPhase, μModule, Linear Technology and the Linear logo are registered
trademarks and No R SENSE is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
6144194, 5055767
TYPICAL APPLICATION
V IN
VSNSN
V OUT
20k
20k
V IN
V CC
1nF
220Ω 33pF
220pF
12.7k
470μF
1μF
0.1μF
PWM1
VINSNS
FB1 LTC3860 ISNS2N
SS1,2
VSNSOUT
VSNSP I AVG
SGND CLKIN
V CC RUN1,2
FREQ I LIM1
FB2 ISNS1P
I LIM2 ISNS1N
COMP1,2 ISNS2P
PWM2
PWM1
V CC
50k
0.22μF
0.22μF
PWM2
V CC
100pF
LTC4449
IN GND
V LOGIC TG
V CC TS
BOOST BG
0.22μF
LTC4449
IN GND
V LOGIC TG
V CC TS
BOOST BG
TG1
SW1
BG1
V IN
TG2
SW2
BG2
0.3μH
2.32k
2.32k
0.3μH
3860 TA01
V OUT
1.2V
330μF 50A
4
0.22μF
3860fc
1
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相关代理商/技术参数 |
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| LTC3860IUH#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 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: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) |
| LTC3860IUH#TRPBF | 功能描述:IC REG CTRLR BUCK PWM VM 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3861EUH-1#PBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:BUCK CNTRL DUAL 12PH 2.25MHZ 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, DUAL, 12PH, 2.25MHZ, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 2.25MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:60A, Supply Voltage Min:3V, Supply Voltage Max:5.5V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:2.25MHz , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Dual-Phase/Dual-Channel Step-Down Voltage Mode Controller w |
| LTC3861EUH-1#TRPBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN |
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