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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： | 1/8頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LT1309 |
1
LT1309
The LT
1309 is a 500kHz micropower DC/DC converter
for Flash Memory. The regulator features Burst Mode
TM
operation with a 0.5A, 300mV switch, enabling 85%
efficiency at the fixed 12V output. High frequency opera-
tion permits the use of small value, and therefore small
size, surface mount inductors and capacitors. The LT1309
comes in an 8-lead SO package allowing extremely
compact PC board layouts. These features make the
device attractive for PCMCIA cards, cellular phones and
other applications where PC board space is limited.
Quiescent current is 650
μ
A decreasing to 9
μ
A when the
part shuts down. The device includes a soft start feature
which limits supply current transients during turn-on.
The LT1309 contains a VPP VALID comparator with a
logic output that goes low when the output voltage is
ready to program 12V Flash Memory. This comparator
simplifies the interface to external control logic.
500kHz Micropower
DC/DC Converter
for Flash Memory
S
FEATURE
D
U
ESCRIPTIO
I
60mA Output Current at 12V from 3V or 5V Supply
I
Shutdown to 9
μ
A
I
VPP VALID Comparator
I
Up to 85% Efficiency
I
Switching Frequency: 500kHz (Typical)
I
Quiescent Current: 650
μ
A
I
Low V
CESAT
Switch: 300mV at 0.5A (Typical)
I
Soft Start Reduces Supply Current Transients
I
Uses Low Value, Small Size,
Surface Mount Inductors
I
Available in 8-Lead SO Package
U
A
O
PPLICATI
TYPICAL
12V, 60mA Flash Memory Programming Supply
12V Output Efficiency
LOAD CURRENT (mA)
1
70
E
72
74
76
78
86
10
100
LT1309 TA02
80
82
84
V
IN
= 5V
V
IN
= 3.3V
V
IN
V
SW
L1*
10
μ
H
D1
VPP 12V, 60mA
SENSE
VPP VALID
LT1309
ON/OFF
VPP VALID
R1
1M
LT1309 TA01
C3
0.1
μ
F
C2
1
μ
F**
C1
4.7
μ
F
MURATA ERIE LQH3C100K0YM00
CERAMIC
MOTOROLA MBR0530
*
**
ON/OFF
V
IN
3.3V TO 5V
SOFT
START
GND
PGND
+
U
S
A
O
PPLICATI
I
Flash Memory VPP Generators
I
Type II and III PCMCIA Card DC/DC Converters
I
3V to 12V, 5V to 12V Converters
I
Portable Computers and Instruments
I
Cellular Telephones
I
DC/DC Converter Module Replacements
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
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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 - 穩壓器 - DC DC 開關穩壓器 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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