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參數(shù)資料
| 型號(hào)： | LT3460ESC6 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.3MHz Step-Up DC/DC Converter in SC70 and ThinSOT |
| 中文描述： | 0.6 A SWITCHING REGULATOR, 1700 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | PLASTIC, SC-70, 6 PIN |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 211K |
| 代理商： | LT3460ESC6 |
LT3460
4
3460f
PIU
BLOCK DIAGRA
SW (Pin 1/Pin 1):
Switch Pin. Connect inductor/diode
here. Minimize trace at this pin to reduce EMI.
GND (Pin 2/Pins 2 and 5):
Ground Pin. Tie directly to local
ground plane.
FB (Pin 3/Pin 3):
Feedback Pin. Reference
voltage is 1.255V. Connect resistor divider tap here.
Minimize trace area at FB. Set V
OUT
according to
V
OUT
= 1.255V (1 + R1/R2).
SHDN (Pin 4/Pin 4):
Shutdown Pin. Tie to 1.5V or higher
to enable device; 0.4V or less to disable device. Also
functions as soft-start. Use RC filter (47k, 47nF typ) as
shown in Figure 1.
V
IN
(Pin 5/Pin 6):
Input Supply Pin. Must be locally
bypassed.
OPERATIOU
The LT3460 uses a constant frequency, current mode
control scheme to provide excellent line and load regula-
tion. Operation can be best understood by referring to the
block diagram in Figure 1. At the start of each oscillator
cycle, the SR latch is set, which turns on the power switch
Q1. A voltage proportional to the switch current is added
to a stabilizing ramp and the resulting sum is fed into the
positive terminal of the PWM comparator A2. When this
voltage exceeds the level at the negative input of A2, the SR
latch is reset turning off the power switch. The level at the
negative input of A2 is set by the error amplifier A1, and is
simply an amplified version of the difference between the
feedback voltage and the reference voltage of 1.255V. In
this manner, the error amplifier sets the correct peak
current level to keep the output in regulation. If the error
amplifier’s output increases, more current is delivered to
the output; if it decreases, less current is delivered.
–
+
–
+
–
+
5
1
3
2
∑
V
OUT
R1 (EXTERNAL)
R2 (EXTERNAL)
R
S
(EXTERNAL)
C
S
(EXTERNAL)
FB
SHUTDOWN
SHDN
RAMP
GENERATOR
1.255V
REFERENCE
1.3MHz
OSCILLATOR
R
S
Q
4
A1
A2
COMPARATOR
DRIVER
R
C
C
C
SW
Q1
0.1
GND
(PINS 2 AND 5 SC70 PACKAGE)
V
IN
(PIN 6 SC70 PACKAGE)
FB
3460 BD
R
S
, C
S
OPTIONAL SOFT-START COMPONENTS
Figure 1. Block Diagram
(ThinSOT/SC70 Packages)
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3460ESC6#TR | 功能描述:IC REG BOOST ADJ 0.3A SC706 RoHS:否 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:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3460ESC6#TRM | 功能描述:IC REG BOOST ADJ 0.3A SC70-6 RoHS:否 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:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3460ESC6#TRMPBF | 功能描述:IC REG BOOST ADJ 0.3A SC70-6 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:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3460ESC6#TRPBF | 功能描述:IC REG BOOST ADJ 0.3A SC70-6 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:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3460ESC6-1#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.5V to 16V 6-Pin SC-70 |
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