- 您现在的位置：买卖IC网 > PDF目录67758 > LTC3770EUH#TR (LINEAR TECHNOLOGY CORP) 4 A SWITCHING CONTROLLER, PQCC32 PDF资料下载
参数资料
| 型号： | LTC3770EUH#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 4 A SWITCHING CONTROLLER, PQCC32 |
| 封装： | 5 X 5 MM, PLASTIC, QFN-32 |
| 文件页数： | 1/24页 |
| 文件大小： | 327K |
| 代理商： | LTC3770EUH#TR |
1
LTC3770
3770fb
Fast No RSENSE
TM Step-Down
Synchronous Controller with
Margining, Tracking and PLL
■ Wide VIN Range: 4V to 32V
■
±0.67% 0.6V Reference Voltage
■ Output Voltage Tracking Capability
■ Programmable Margining
■ Sense Resistor Optional
■ True Current Mode Control
■
2% to 90% Duty Cycle at 200kHz
■ tON(MIN) ≤ 100ns
■ Phase Lock Loop Frequency Synchronization
■ Powerful Dual N-Channel MOSFET Driver
■
Adjustable Cycle-by-Cycle Current Limit
■
Adjustable Switching Frequency
■
Programmable Soft-Start
■
Current Foldback Protection (Disabled at Start-Up)
■
Output Overvoltage Protection
■
Micropower Shutdown: IQ < 30A
■
Power Good Output Voltage Monitor
Tracks the Reference Input Pin
■ Available in (5mm
× 5mm) QFN and 28-Lead
SSOP Packages
■
Distributed Power Systems
■
Server Power Supply
The LTC
3770 is a synchronous step-down switching
regulator controller with output voltage up/down tracking
capability and voltage margining. Its advanced functions
and high accuracy reference are ideal for powering
high performance server, ASIC and computer memory
systems.
The LTC3770 uses a constant on-time, valley current
mode control architecture to deliver very low duty factors
without requiring a sense resistor. The operating fre-
quency is selected by an external resistor and is compen-
sated for variations in input supply voltage. An internal
phase-lock loop allows the IC to be synchronized to an
external clock.
Fault protection is provided by an overvoltage comparator
and input undervoltage lockout. The regulator current limit
is user programmable. A wide supply range allows volt-
ages as high as 32V to be stepped down to as low as a 0.6V
output. Power supply sequencing is accomplished using
an external soft-start timing capacitor.
High Efficiency Step-Down Converter
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
LOAD CURRENT (A)
EFFICIENCY
(%)
100
90
80
70
60
50
95
85
75
65
55
POWER
LOSS
(W)
10
0.1
1
0.01
1
10
3770 TA01b
0.1
VIN = 5V
VOUT = 2.5V
EFFICIENCY
POWER LOSS
Efficiency and Power Loss vs Load Current
CMDSH-3
B340A
95.3k
30.1k
10k
82k
1.8
H
4.7
F
10
F
35V
x3
VIN
5V TO 28V
VOUT
2.5V
10A
180
F
4V
x2
Si4874
Si4884
68k
0.1
F
0.22
F
10k
1000pF
VOUT
10k
0.01
F
+
ION
VIN
TG
SW
BOOST
PLLIN
RUN
ITH
SGND
INTVCC
BG
PGND
SENSE–
SENSE+
VFB
VREFIN
LTC3770
DRVCC
PGOOD
MPGM
VREFOUT
VON
VRNG
MARGIN
TRACK/SS
PLLFLTR
3770 TA01
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
RSENSE is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 5487554, 6580258, 6304066, 6476589,
6774611.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3770EG#TR | 4 A SWITCHING CONTROLLER, PDSO28 |
| LTC3780MPG#TR | 3 A SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PDSO24 |
| LTC3809IMSE-1#TR | 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO10 |
| LTC3809IMSE-1 | 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO10 |
| LTC3809IDD-1 | 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PQCC10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3772BEDDB#TRMPBF | 功能描述:IC REG CTRLR BUCK PWM CM 8-DFN 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) |
| LTC3772BEDDB#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 8-DFN 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) |
| LTC3772BETS8#TRMPBF | 功能描述:IC REG CTRLR BUCK PWM TSOT23-8 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) |
| LTC3772BETS8#TRPBF | 功能描述:IC REG CTRLR BUCK PWM TSOT23-8 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) |
| LTC3772EDDB#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.75V to 9.8V Input 8-Pin DFN EP |
发布紧急采购，3分钟左右您将得到回复。