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參數(shù)資料
| 型號： | LT3686EDD#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 2/28頁 |
| 文件大小： | 509K |
| 代理商： | LT3686EDD#PBF |
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LT3686
10
3686fc
Input Voltage Range
TheinputvoltagerangefortheLT3686applicationsdepends
ontheoutputvoltageandontheabsolutemaximumratings
of the VIN and BOOST pins. The minimum input voltage
is determined by either the LT3686’s minimum operating
voltage of 3.6V, or by its maximum duty cycle.
Thedutycycleisthefractionoftimethattheinternalswitch
is on and is determined by the input and output voltages:
DC
=
VOUT + VD
VIN – VSW + VD
Where VD is the forward voltage drop of the catch diode
(~0.4V) and VSW is the voltage drop of the internal switch
(~0.67V at maximum load). This leads to a minimum input
voltage of:
VIN(MIN)=
VOUT + VD
DCMAX
– VD + VSW
DCMAX can be adjusted with frequency.
The boost capacitor is charged with the energy stored in
the inductor, the circuit will rely on some minimum load
current to sustain the charge across the boost capacitor.
ApplicAtions inForMAtion
FB Resistor Network
The output voltage is programmed with a resistor divider
between the output and the FB pin. Choose the 1% resis-
tors according to:
R1=R2
VOUT
0.8V
– 1
R2 should be 20k or less to avoid bias current errors.
Reference designators refer to the Block Diagram.
Programmable Undervoltage Lockout
The EN/UVLO pin can be programmed by an external re-
sistor divider between VIN and the EN/UVLO pin. Choose
the resistors according to:
R4
=R5
VIN
1.27V
– 1
R4 also sets the hysteresis voltage for the programmable
UVLO:
Hysteresis=R42.4A
OnceVINdropsbelowtheprogrammedvoltage,theLT3686
will enter a low quiescent current state (IQ ≈ 15A). To
shutdown the LT3686 completely (IQ < 1A), reduce EN/
UVLO pin voltage to below 0.4V.
Figure 1. IQ vs VEN/UVLO (VIN = 10V)
Figure 2. EN/UVLO Pin Current
EN/UVLO (V)
1
10
I Q
(A)
1000
100
0
1
2
3
4
5
6
7
3686 F01
0.1
10000
8
EN/UVLO (V)
5
10
EN/UVLO
(A)
20
25
30
35
40
15
0
10
20
30
40
50
3686 F02
0
45
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3686IDD#TRPBF | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3688IFE#TRPBF | SWITCHING REGULATOR, PDSO24 |
| LT3688EUF#PBF | SWITCHING REGULATOR, PQCC24 |
| LT3688IFE#PBF | SWITCHING REGULATOR, PDSO24 |
| LT3688HFE#PBF | SWITCHING REGULATOR, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3686EDDTRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
| LT3686HDD#PBF | 功能描述:IC REG BUCK ADJ 1.2A 10-DFN 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 |
| LT3686HDD#PBF | 制造商:Linear Technology 功能描述:IC PWM STEP-DOWN DC/DC CONVERTER DFN10 制造商:Linear Technology 功能描述:IC, PWM STEP-DOWN DC/DC CONVERTER, DFN10 |
| LT3686HDD#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 10DFN 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:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT3686IDD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
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