- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44994 > LTC3831IGN (LINEAR TECHNOLOGY CORP) SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 PDF資料下載
參數(shù)資料
| 型號： | LTC3831IGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 208K |
| 代理商： | LTC3831IGN |
LTC3831
1
3831fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Power Synchronous
Switching Regulator Controller
for DDR Memory Termination
The LTC3831 is a high power, high efciency switching
regulator controller designed for DDR memory termina-
tion. The LTC3831 generates an output voltage equal
to 1/2 of an external supply or reference voltage. The
LTC3831 uses a synchronous switching architecture
with N-channel MOSFETs. Additionally, the chip senses
output current through the drain-source resistance of the
upper N-channel FET, providing an adjustable current limit
without a current sense resistor.
The LTC3831 operates with input supply voltage as low as
3V and with a maximum duty cycle of > 91%. It includes
a xed frequency PWM oscillator for low output ripple
operation. The 200kHz free-running clock frequency can
be externally adjusted or synchronized with an external
signal from 100kHz to above 500kHz. In shutdown mode,
the LTC3831 supply current drops to <10μA.
Figure 1. Typical DDR Memory Termination Application
n High Power Switching Regulator Controller
for DDR Memory Termination
n VOUT Tracks 1/2 of VIN or External VREF
n No Current Sense Resistor Required
n Low Input Supply Voltage Range: 3V to 8V
n Maximum Duty Cycle > 91% Over Temperature
n Drives All N-Channel External MOSFETs
n High Efciency: Over 95% Possible
n Programmable Fixed Frequency Operation:
100kHz to 500kHz
n External Clock Synchronization Operation
n Programmable Soft-Start
n Low Shutdown Current: <10μA
n Overtemperature Protection
n Available in 16-Pin Narrow SSOP Package
n DDR SDRAM Termination
n SSTL_2 Interface
n SSTL_3 Interface
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Efciency vs Load Current
TG
IMAX
IFB
BG
PGND
GND
R+
FB
VCC
SS
FREQSET
SHDN
COMP
PVCC2
MBR0530T1
5V
10k
1k
0.1μF
LO
1.2μH
Q2
CIN: SANYO POSCAP 6TPB330M
COUT: SANYO POSCAP 4TPB470M
Q1, Q2: SILICONIX Si4410DY
COUT
470μF
×3
VTT
1.25V
±6A
3831 F01
Q1
MBRS340T3
VDDQ
2.5V
LTC3831
1μF
SHDN
+
4.7μF
PVCC1
R–
+
CIN
330μF
×2
+
0.1μF
C1
33pF
0.01μF
130k
CC
1500pF
RC
15k
LOAD CURRENT (A)
0
EFFICIENCY
(%)
20
40
60
1
2
34
2831 G01
5
80
100
10
30
50
70
90
6
TA = 25°C
VIN = 2.5V
VOUT = 1.25V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3833IUDC#PBF | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20 |
| LTC3833EFE#TRPBF | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO20 |
| LTC3833EUDC#TRPBF | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20 |
| LTC3833EUDC#PBF | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20 |
| LTC3833IFE#PBF | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3831IGN#PBF | 功能描述:IC SW REG CONTROLLR SYNC 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3831IGN#TRPBF | 功能描述:IC SW REG CONTROLLR SYNC 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3832-1ES8 | 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC3832-1ES8#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)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(shù):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(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC3832-1ES8#TR | 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(shù):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) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。