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參數資料
| 型號： | LTC3823EUH |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封裝： | 5 X 5 MM, PLASTIC, MO-220WHHD, QFN-32 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 345K |
| 代理商： | LTC3823EUH |
LTC3823
3823fb
typical application
features
applications
description
Fast No RSENSETM Step-Down
Synchronous Controller with
Differential Output Sensing,
Tracking and PLL
TheLTC3823isasynchronousstep-downswitchingregu-
latorcontrollerwithtrueremotedifferentialoutputsensing
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 factors
withoutrequiringasenseresistor.Theoperatingfrequency
is selected by an external resistor and is compensated
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 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.
■
Wide VIN Range: 4.5V to 36V
■
±0.67%, 0.6V Reference Voltage
■
Output Voltage Tracking Capability
■
True Remote Sensing Differential Amplifier
■
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: 30A
■
Power Good Output Voltage Monitor Tracks the
Reference Input Pin
■
Available in (5mm
× 5mm) 32-Lead QFN and
28-Lead SSOP Narrow Packages
■
Distributed Power Systems
■
Server Power Supplies
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No RSENSE is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
CMDSH-3
B340A
9.5k
1.8
H
10
F
10
F
35V
×3
VIN
5V TO 28V
VOUT
2.5V
10A
180
F
4V
×2
Si4874
Si4884
68k
0.1
F
0.22
F
10k
1000pF
VOUT
3k
10k
0.01
F
+
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 TA01
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
Efficiency and Power Loss
vs Load Current
High Efficiency Step-Down Converter
相關PDF資料 |
PDF描述 |
|---|---|
| LTC3823EGN | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3823EUH#TR | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC32 |
| LTC3823EGN#TR | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3827IUH | 3 A DUAL SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PQCC32 |
| LTC3827IUH#TR | 3 A DUAL SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PQCC32 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3823EUH#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:- 標準包裝:2,000 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
| LTC3823EUH#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) |
| LTC3823IGN#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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:2,000 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
| LTC3823IGN#PBF | 制造商:Linear Technology 功能描述:IC SYNC STEP-DOWN DC/DC CTRL SSOP-28 |
| LTC3823IGN#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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) |
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