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參數資料
| 型號： | LT1309 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 500kHz Micropower DC/DC Converter for Flash Memory(微功耗,600MHz,DC/DC變換器（用于閃速存儲器）) |
| 中文描述： | 500kHz的微功率直流/直流轉換器的快閃記憶體（微功耗，頻率600MHz，直流/直流變換器（用于閃速存儲器）） |
| 文件頁數： | 5/8頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LT1309 |
5
LT1309
OPERATIOU
The LT1309 is a current limited, Burst Mode (gated
oscillator) type switching regulator that produces a 12V
output from a 3.3V or 5V input. Operation can best be
understood by referring to the Block Diagram. When the
voltage at the Sense pin (Pin 7) is less than 12V, compara-
tor C1 enables the oscillator, turning switches Q1 and Q2
on. The switch turns off when current limit is reached or
when the oscillator maximum on-time is reached. When
Q2 turns off, current built up in the inductor flows into the
output capacitor and load. This action occurs until the
output voltage reaches 12V. During start-up, the Sense pin
voltage is either 3.3V or 5V, depending on the input. The
VPP VALID signal remains high until the output voltage
reaches 12V, signaling correct voltage level to program
flash memory. Connecting a 1
μ
F/0.1
μ
F parallel RC to the
Soft Start pin limits inrush current during start-up.
BLOCK DIAGRAW
V
CC
8
ON/OFF
SENSE
7
4k
864k
200k
VPP VALID
OFF
Q3
Q2
×
1
Q1
×
50
100k
–
+
C2
V
REF
1.24V
R1
3
–
+
C3
36mV
–
V
CC
2
PGND
1309 BD
SW
4
R2
700
5
3
GND
1
SOFT START
BIAS
+
500kHz
OSCILLATOR
–
+
C1
POWER ON
6
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1309CS8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500kHz Micropower DC/DC Converter for Flash Memory |
| LT130Z | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:GREEN OVAL LAMP LED |
| LT131 | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:RED OVAL LAMP LED |
| LT1310 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LT1310EMSE | 功能描述:IC REG BOOST ADJ 1.5A 10MSOP RoHS:否 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:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數: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: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) 供應商設備封裝:8-SOIC |
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