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參數(shù)資料
| 型號： | LTC3611EWP |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 10 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PQCC64 |
| 封裝： | 9 X 9 MM, PLASTIC, QFN-64 |
| 文件頁數(shù)： | 7/26頁 |
| 文件大?。?/td> | 411K |
| 代理商： | LTC3611EWP |
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LTC3611
3611fd
LTC3611
SGND
48
SGND
47
SGND
46
SGND
45
EXTVCC
44
VFB
43
SGND
42
ION
41
R4
SGND
40
FCB
39
ITH
38
VRNG
37
PGOOD
36
VON
35
SGND
34
SGND
PGND
33
PV
IN
17
PV
IN
18
PV
IN
19
PV
IN
20
PV
IN
21
PV
IN
22
PV
IN
23
PV
IN
24
PV
IN
25
SW
26
NC
27
SGND
28
BOOST
29
RUN/SS
30
SGND
31
SGND
32
PGND
64
PGND
63
PGND
62
PGND
61
PGND
60
PGND
59
PGND
58
PGND
57
PGND
56
SW
55
INT
V CC
54
INT
V CC
53
SV
IN
52
SV
IN
51
SGND
50
SGND
49
PGND
1
PGND
2
PGND
3
SW
4
SW
5
SW
6
SW
7
SW
8
SW
9
SW
10
SW
11
PVIN
VIN
12
PVIN
13
PVIN
14
PVIN
15
PVIN
16
3611 F04
CSEC
1F
VOUT2
VOUT1
COUT
CIN
IN4148
OPTIONAL EXTVCC
CONNECTION
5V < VOUT2 < 7V
T1
1:N
R3
+
+
SGND
with changes in VIN. Tying the FCB pin below the 0.6V
threshold forces continuous synchronous operation, al-
lowing current to reverse at light loads and maintaining
high frequency operation.
In addition to providing a logic input to force continuous
operation, the FCB pin provides a means to maintain a
yback winding output when the primary is operating
in discontinuous mode. The secondary output VOUT2 is
normally set as shown in Figure 4 by the turns ratio N
of the transformer. However, if the controller goes into
discontinuous mode and halts switching due to a light
primary load current, then VOUT2 will droop. An external
resistor divider from VOUT2 to the FCB pin sets a minimum
voltage VOUT2(MIN) below which continuous operation is
forced until VOUT2 has risen above its minimum:
VOUT2(MIN) = 0.6V 1+
R4
R3
ApplicAtions inForMAtion
Fault Conditions: Current Limit and Foldback
The LTC3611 has a current mode controller which inher-
ently limits the cycle-by-cycle inductor current not only
in steady state operation but also in transient. To further
limit current in the event of a short circuit to ground, the
LTC3611 includes foldback current limiting. If the output
fallsbymorethan25%,thenthemaximumsensevoltageis
progressively lowered to about one sixth of its full value.
INTVCC Regulator and EXTVCC Connection
An internal P-channel low dropout regulator produces the
5V supply that powers the drivers and internal circuitry
withintheLTC3611.TheINTVCCpincansupplyupto50mA
RMS and must be bypassed to ground with a minimum of
4.7μF tantalum or ceramic capacitor. Good bypassing is
necessary to supply the high transient currents required
by the MOSFET gate drivers.
Figure 4. Secondary Output Loop and EXTVCC Connection
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| LTC3611EWP#PBF | 功能描述:IC REG BUCK SYNC ADJ 10A 64QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):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(guān):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(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3611EWP#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 10A 64QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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