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參數資料
| 型號： | LTC3823IGN#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 4 A SWITCHING CONTROLLER, PDSO28 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-28 |
| 文件頁數： | 1/26頁 |
| 文件大?。?/td> | 302K |
| 代理商： | LTC3823IGN#TRPBF |
LTC3823
1
3823fd
FEATURES
APPLICATIONS
DESCRIPTION
Fast No RSENSETM Step-Down
Synchronous DC/DC Controller
with Differential Output Sensing,
Tracking and PLL
The LTC
3823 is a synchronous step-down switching regu-
lator controller with true remote differential output sensing
andoutputvoltageup/downtrackingcapability.Itsadvanced
functionsandhighaccuracyreferenceareidealforpowering
high performance server, ASIC and computer memory
systems.
The LTC3823 uses a constant on-time, valley current
mode control architecture to deliver very low duty fac-
tors without requiring a sense resistor. The operating
frequency is selected by an external resistor and is com-
pensated for variations in input supply voltage. An internal
phase-locked loop allows the IC to be synchronized to an
external clock.
Fault protection is provided by an overvoltage compara-
tor and input undervoltage lockout. The regulator current
limit is user programmable. A wide supply range allows
voltages as high as 36V to be stepped down to as low as
a 0.6V output. When using remote sense, output voltages
up to 3.3V can be developed, and up to 90% of VIN without
remote sense. Power supply sequencing is accomplished
using an external soft-start timing capacitor.
L, LT, LTC, LTM, 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. Protected by U.S. Patents including 5481178, 5847554,
6580258, 6304066, 6476589, 6774611.
n Wide VIN Range: 4.5V to 36V
n ±0.67%, 0.6V Reference Voltage
n Output Voltage Tracking Capability
n True Remote Sensing Differential Amplier
n Sense Resistor Optional
n True Current Mode Control
n 2% to 90% Duty Cycle at 200kHz
n tON(MIN) < 100ns
n Phase-Locked Loop Frequency Synchronization
n Powerful Dual N-Channel MOSFET Driver
n Adjustable Cycle-by-Cycle Current Limit
n Adjustable Switching Frequency
n Programmable Soft-Start
n Current Foldback Protection (Disabled at Start-Up)
n Output Overvoltage Protection
n Micropower Shutdown: 30μA
n Power Good Output Voltage Monitor Tracks the
Reference Input Pin
n Available in (5mm
× 5mm) 32-Lead QFN and
28-Lead SSOP Narrow Packages
n Distributed Power Systems
n Server Power Supplies
CMDSH-3
B340A
9.5k
1.8μH
10μF
35V
3
VIN
5V TO 28V
VOUT
2.5V
10A
180μF
4V
2
Si4874
Si4884
68k
0.1μF
0.22μF
10k
1000pF
VOUT
3k
10k
0.01μF
+
ION
VIN
TG
SW
BOOST
PLLIN
RUN
ITH
SGND
INTVCC
BG
PGND
SENSE–
SENSE+
VOUTSENSE+
VFB
LTC3823
DRVCC
PGOOD
VOUTSENSE–
VDIFFOUT
VON
VRNG
TRACK/SS
PLLFLTR
3823 TA01a
LOAD CURRENT (A)
0.1
87
EFFICIENCY
(%)
POWER
LOSS
(W)
88
90
91
92
97
94
0.01
0.1
10
1
3823 TA01b
89
95
96
93
10
VIN = 5V
VOUT = 2.5V
FIGURE 12 CIRCUIT
EFFICIENCY
POWER LOSS
Efciency and Power Loss
vs Load Current
High Efciency Step-Down Converter
TYPICAL APPLICATION
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相關代理商/技術參數 |
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| LTC3823IUH#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數:1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC3823IUH#PBF | 制造商:Linear Technology 功能描述:IC SYNC STEP-DOWN DC/DC CONTROLLER QFN32 |
| LTC3823IUH#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3824EMSE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 4V to 60V Input 10-Pin MSOP EP |
| LTC3824EMSE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數:1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
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