- 您現(xiàn)在的位置：買賣IC網 > PDF目錄377775 > LTC3413 (Linear Technology Corporation) 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination PDF資料下載
參數資料
| 型號： | LTC3413 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination |
| 中文描述： | 第3A，2MHz的單片同步調節(jié)器用于DDR / QDR存儲器終端 |
| 文件頁數： | 11/16頁 |
| 文件大小： | 243K |
| 代理商： | LTC3413 |
11
LTC3413
sn3413 3413fs
APPLICATIOU
125
°
C.
Note that at higher supply voltages, the junction tempera-
ture is lower due to reduced switch resistance (R
DS(ON)
).
W
U
U
Checking Transient Response
The regulator loop response can be checked by looking at
the load transient response. Switching regulators take
several cycles to respond to a step in load current. When
a load step occurs, V
OUT
immediately shifts by an amount
equal to
I
LOAD
(ESR), where ESR is the effective series
resistance of C
OUT
.
I
LOAD
also begins to charge or
discharge C
OUT
generating a feedback error signal used by
the regulator to return V
OUT
to its steady-state value.
During this recovery time, V
OUT
can be monitored for
overshoot or ringing that would indicate a stability prob-
lem. The I
TH
pin external components and output capaci-
tor shown in Figure 1a will provide adequate compensa-
tion for most applications.
Output Voltage Tracking of V
REF
For applications in which the V
REF
pin is connected to the
V
IN
pin, the output voltage will be equal to one-half of the
voltage on the V
IN
pin. Because the output voltage will
track the input voltage, any disturbance on V
IN
will appear
on V
OUT
. For example, a load step transient could cause
the input voltage to drop if there is insufficient bulk
capacitance at the V
IN
pin. The corresponding drop in the
output voltage during the load step transient is caused by
the V
OUT
tracking of V
IN
and should not be confused with
poor load regulation.
Design Example
As a design example, consider using the LTC3413 in an
application with the following specifications: V
IN
= 2.5V,
V
OUT
= 1.25V, I
OUT(MAX)
=
±
3A, f = 1MHz.
First, calculate the timing resistor:
R
k
k
OSC
=
=
3 23 10
1 10
10
313
11
6
.
–
Use a standard value of 309k. Next, calculate the inductor
value for about 40% ripple current:
L
V
1 2
MHz
1
A
V
V
H
=
=
μ
1 25
.
1
1 25
2 5
.
0 47
.
–
.
Using a 0.47
μ
H inductor results in a maximum ripple
current of:
=
μ
=
I
V
MHz
1
H
V
V
A
L
1 25
.
0 47
1
1 25
2 5
.
1 33
.
–
.
C
OUT
will be selected based on the ESR that is required to
satisfy the output voltage ripple requirement and the bulk
capacitance needed for loop stability. For this design, two
100
μ
F ceramic capacitors will be used. C
IN
should be sized
for a maximum current rating of:
I
A
V
V
V
V
A
RMS
RMS
=
=
3
1 25
2 5
.
2 5
1 25
.
1
1 5
.
.
.
–
Decoupling the PV
IN
pins with two 100
μ
F capacitors is
相關PDF資料 |
PDF描述 |
|---|---|
| LTC3413EFE | 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination |
| LTC3423 | Low Output Voltage 3MHz Micropower Synchronous Boost Converters |
| LTC3423EMS | Low Output Voltage 3MHz Micropower Synchronous Boost Converters |
| LTC3424 | Low Output Voltage 3MHz Micropower Synchronous Boost Converters |
| LTC3424EMS | Low Output Voltage 3MHz Micropower Synchronous Boost Converters |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3413EFE | 功能描述:IC REG BUCK SYNC ADJ 3A 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3413EFE#PBF | 功能描述:IC REG BUCK SYNC ADJ 3A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3413EFE#TR | 功能描述:IC REG BUCK SYNC ADJ 3A 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3413EFE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 3A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3413EFEPBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:3A 2MHz Reg. for DDR Termination TSSOP16 |
發(fā)布緊急采購，3分鐘左右您將得到回復。