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参数资料
| 型号： | LTC3865IUH#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 880 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封装： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32 |
| 文件页数： | 1/38页 |
| 文件大小： | 400K |
| 代理商： | LTC3865IUH#TRPBF |
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LTC3865/LTC3865-1
1
3865fb
TYPICAL APPLICATION
DESCRIPTION
Dual, 2-Phase Synchronous
DC/DC Controller with
Pin Selectable Outputs
The LTC
3865/LTC3865-1 are high performance dual
synchronous step-down DC/DC switching regulator
controllers that drive all N-channel synchronous power
MOSFET stages. A constant frequency current mode
architecture allows a phase-lockable frequency of up to
770kHz. Power loss and noise are minimized by operating
the two controller output stages out of phase.
OPTI-LOOP
compensation allows the transient response
to be optimized over a wide range of output capacitance
and ESR values. Independent track/soft-start pins for
each controller ramp the output voltage during start-up.
Current foldback limits MOSFET heat dissipation during
short-circuit conditions. The MODE/PLLIN pin selects
among Burst Mode operation, pulse-skipping mode,
and continuous inductor current mode. The output volt-
ages can be precisely programmed by pin strapping or
external resistors.
The LTC3865/LTC3865-1 are available in low prole (5mm
× 5mm) 32-pin QFN and 38-Lead thermally enhanced
TSSOP packages.
FEATURES
APPLICATIONS
n Dual, 180° Phased Controllers
n 2-Pin VID Output Voltage Programming from 0.6V
to 5V
n High Efciency: Up to 95%
n RSENSE or DCR Current Sensing
n Phase-Lockable Fixed Frequency 250kHz to 770kHz
n Adjustable Current Limit
n Dual N-Channel MOSFET Synchronous Drive
n Wide VIN Range: 4.5V to 38V Operation
n Adjustable Soft-Start Current Ramping or Tracking
n Output OV Protection With Reverse Current Limit
n Power Good Output Voltage Monitor
n 32-Pin 5mm
× 5mm QFN and 38-Lead TSSOP
Packages
n DC Power Distribution Systems
High Efciency 1.5V/15A, 1.2V/15A Step-Down Converter
0.1μF
0.47μH
1000pF
22μF
50V
10k
VOUT1
1.5V
15A
0.1μF
0.47μH
1000pF
100μF
15k
162k
VOUT2
1.2V
15A
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
BG2
SGND
PGND
FREQ
SENSE1+
SENSE2+
SENSE1–
SENSE2–
VOSENSE1
VOSENSE2
ITH1
ITH2
VIN
INTVCC
TK/SS1
TK/SS2
VIN
4.5V TO 24V
3865 TA01a
0.1μF
100pF
0.1μF
LTC3865
VID11
VID12
VID21
VID22
4.7μF
100μF
COUT2,3
100pF
100Ω
2.2Ω
1μF
2mΩ
+
COUT5,6
+
LOAD CURRENT (A)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
20
10
80
50
70
60
40
0.01
1
10
100
3865 TA01b
0
0.1
10
1
0.01
0.1
VIN = 12V
VOUT = 1.5V
EFFICIENCY
POWER LOSS
Efciency and Power Loss
vs Load Current
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, μModule, Linear Technology and the Linear logo
are registered trademarks and No RSENSE is a trademark of Linear Technology Corporation. All
other trademarks are the property of their respective owners. U.S. Patents, including 5481178,
5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3866EFE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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) |
| LTC3866EFE#PBF | 制造商:Linear Technology 功能描述:BUCK REGULATOR CURRENT MODE SYNC TSSOP |
| LTC3866EFE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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) |
| LTC3866EUF#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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) |
| LTC3866EUF#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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) |
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