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參數(shù)資料
| 型號(hào)： | LTC3831EGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 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> | 236K |
| 代理商： | LTC3831EGN |
1
LTC3831
3831f
High Power Synchronous
Switching Regulator Controller
for DDR Memory Termination
I
High Power Switching Regulator Controller
for DDR Memory Termination
I
V
OUT
Tracks 1/2 of V
IN
or External V
REF
I
No Current Sense Resistor Required
I
Low Input Supply Voltage Range: 3V to 8V
I
Maximum Duty Cycle >91% Over Temperature
I
Drives All N-Channel External MOSFETs
I
High Efficiency: Over 95% Possible
I
Programmable Fixed Frequency Operation:
100kHz to 500kHz
I
External Clock Synchronization Operation
I
Programmable Soft-Start
I
Low Shutdown Current: <10
μ
A
I
Overtemperature Protection
I
Available in 16-Pin Narrow SSOP Package
APPLICATIU
I
DDR SDRAM Termination
I
SSTL_2 Interface
I
SSTL_3 Interface
Efficiency vs Load Current
, LTC and LT are registered trademarks of Linear Technology Corporation.
Figure 1. Typical DDR Memory Termination Application
The LTC
3831 is a high power, high efficiency 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-chan-
nel MOSFETs. Additionally, the chip senses output cur-
rent 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
fixed 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 <10
μ
A.
TG
I
MAX
I
FB
BG
PGND
GND
R
+
FB
V
CC
SS
FREQSET
SHDN
COMP
PV
CC2
MBR0530T1
5V
10k
1k
0.1
μ
F
0.1
μ
F
L
O
1.2
μ
H
Q2
C
IN
: SANYO POSCAP 6TPB330M
C
: SANYO POSCAP 4TPB470M
Q1, Q2: SILICONIX Si4410DY
C
OUT
470
μ
F
×
3
V
1.25V
±
6A
3831 F01
Q1
MBRS340T3
MBRS340T3
V
2.5V
LTC3831
1
μ
F
SHDN
+
4.7
μ
F
PV
CC1
R
–
+
C
IN
330
μ
F
×
2
+
0.1
μ
F
C1
33pF
0.01
μ
F
130k
C
1500pF
R
C
15k
LOAD CURRENT (A)
0
0
E
20
40
60
1
2
3
4
2831 G01
5
80
100
10
30
50
70
90
6
T
A
= 25
°
C
V
IN
= 2.5V
V
OUT
= 1.25V
DESCRIPTIOU
FEATURES
TYPICAL APPLICATIO
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3831EGN#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(biāo)準(zhǔn)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 |
| LTC3831EGN#TR | 功能描述:IC SW REG CONTROLLR SYNC 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)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 |
| LTC3831EGN#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(biāo)準(zhǔn)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 |
| LTC3831EGN-1 | 功能描述:IC CTRLR SW REG SYNC DDR 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)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 |
| LTC3831EGN-1#PBF | 功能描述:IC CTRLR SW REG SYNC DDR 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)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 |
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