- 您现在的位置：买卖IC网 > PDF目录15228 > LTC3890MPUH#PBF (Linear Technology)IC REG CTRLR BUCK PWM CM 32-QFN PDF资料下载
参数资料
| 型号： | LTC3890MPUH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/40页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 32-QFN |
| 标准包装： | 73 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 850kHz |
| 占空比： | 99% |
| 电源电压： | 4 V ~ 60 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： | -55°C ~ 150°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
当前第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
LTC3890
Wide V IN Range: 4V to 60V (65V Abs Max)
Low Operating I Q : 50μA (One Channel On)
Wide Output Voltage Range: 0.8V ≤ V OUT ≤ 24V
R SENSE or DCR Current Sensing
Out-of-Phase Controllers Reduce Required Input
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple
Selectable Current Limit
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Power Good Output Voltage Monitors
Output Overvoltage Protection
Low Shutdown I Q : < 14μA
Internal LDO Powers Gate Drive from V IN or EXTV CC
No Current Foldback During Start-Up
Small Low Profile (0.75mm) 5mm × 5mm QFN Package
Automotive Always-On Systems
Battery Operated Digital Devices
Distributed DC Power Systems
FEATURES
n
n
n
n
n
Capacitance and Power Supply Induced Noise
n
n
n
Burst Mode ? Operation at Light Loads
n
n
n
n
n
n
n
n
n
APPLICATIONS
n
n
n
TYPICAL APPLICATION
60V Low I Q , Dual, 2-Phase
Synchronous Step-Down
DC/DC Controller
DESCRIPTION
The LTC ? 3890 is a high performance dual step-down
switching regulator DC/DC controller that drives all
N-channel synchronous power MOSFET stages. A constant
frequency current mode architecture allows a phase-
lockable frequency of up to 850kHz. Power loss and noise
due to the ESR of the input capacitor are minimized by
operating the two controller output stages out-of-phase.
The 50μA no-load quiescent current extends operating run
time in battery-powered systems. OPTI-LOOP ? compensa-
tion allows the transient response to be optimized over
a wide range of output capacitance and ESR values. The
LTC3890 features a precision 0.8V reference and power
good output indicators. A wide 4V to 60V input supply
range encompasses a wide range of intermediate bus
voltages and battery chemistries.
Independent TRACK/SS pins for each controller ramp the
output voltages during start-up. Current foldback limits
MOSFET heat dissipation during short-circuit conditions.
The PLLIN/MODE pin selects among Burst Mode operation,
pulse-skipping mode, or continuous conduction mode at
light loads. For a leaded package version (28-lead Narrow
SSOP), see the LTC3890-1 data sheet.
L , LT, LTC, LTM, Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners. Protected by U.S.
Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258,
7230497.
4.7μF
4.7μH
8μH
V IN = 12V
HighEfficiencyDual8.5V/3.3VOutputStep-DownConverter
22μF
V IN INTV CC
TG1 TG2
0.1μF 0.1μF
BOOST1 BOOST2
SW1 SW2
BG1 BG2
LTC3890
PGND
SENSE1 + SENSE2 +
V IN
9V TO 60V
Efficiency and Power Loss
vs Output Current
100
90 V OUT = 3.3V
80
70
60
50
40
30
10000
1000
100
10
0.008?
0.01?
20
1
V OUT1
3.3V
5A
100k
470μF
31.6k
1000pF
34.8k
SENSE1 – SENSE2 –
V FB1 V FB2
ITH1 ITH2
TRACK/SS1 SGND TRACK/SS2
0.1μF 0.1μF
1000pF
34.8k
100k
10.5k
V OUT2
8.5V
3A
330μF
10
0
0.0001
0.001 0.01 0.1 1
OUTPUT CURRENT (A)
0.1
10
3890 TA01b
3890 TA01a
3890fc
1
相关PDF资料 |
PDF描述 |
|---|---|
| ELL-6PV330M | COIL PWR CHOKE 33UH 600MA SMD |
| ELL-6PV270M | COIL PWR CHOKE 27UH 670MA SMD |
| ELL-6PV220M | COIL PWR CHOKE 22UH 700MA SMD |
| ELL-6PV180M | COIL PWR CHOKE 18UH 840MA SMD |
| ELL-6PV150M | COIL PWR CHOKE 15UH 880MA SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3891EFE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 20TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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 |
| LTC3891EFE#PBF | 制造商:Linear Technology 功能描述:IC DC-DC CONV 900kHz TSSOP20 |
| LTC3891EFE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 20TSSOP 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) |
| LTC3891EUDC#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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 |
| LTC3891EUDC#PBF | 制造商:Linear Technology 功能描述:IC DC-DC CONV 900kHz QFN20 |
发布紧急采购，3分钟左右您将得到回复。