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參數(shù)資料
| 型號(hào)： | LT1106CF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4-Bit Synchronous Up/Down Binary Counters 16-PDIP 0 to 70 |
| 中文描述： | 0.5 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 223K |
| 代理商： | LT1106CF |
1
LT1106
Micropower Step-Up
DC/DC Converter for
PCMCIA Card Flash Memory
S
FEATURE
D
U
ESCRIPTIO
The LT
1106 is the industry’s first DC/DC converter
designed for use on Type I and Type II PCMCIA cards. The
device senses the VPP1 and VPP2 lines at the PCMCIA
socket and generates a regulated 12V, 60mA program-
ming supply if the socket does not provide it. Internal logic
simplifies the interface to PCMCIA card microcontrollers.
One input selects a 12V or 5V regulated output, while
another input controls micropower shutdown. Two logic
outputs indicate when the selected programming voltage
is valid and whether the input supply is 3.3V or 5V.
The regulator features Burst Mode
TM
operation with a 0.5A,
300mV switch for efficiency up to 85%. High frequency
500kHz switching permits the use of small value, flat
inductors that fit neatly on PCMCIA cards. The device
requires just 1
μ
F of output capacitance.
Quiescent current is 750
μ
A which drops to 350
μ
A when
the card runs off the socket supply. The shutdown pin
reduces supply current to only 10
μ
A. The device includes
a soft start feature which limits supply current transients
when the card is inserted into a hot socket.
U
S
A
O
PPLICATI
I
PCMCIA Card Flash Memory VPP Generator
I
Portable Computers
I
Portable Instruments
I
DC/DC Converter Module Replacements
I
60mA Output Current at 12V from 3V Supply
I
Shutdown to 10
μ
A
I
Programmable 12V or 5V Output
I
Up to 85% Efficiency
I
Quiescent Current: 750
μ
A
I
Low V
CESAT
Switch: 300mV at 0.5A Typical
I
Uses Low Value, Thin, Surface Mount Inductors
I
Ultra-Thin 20-Lead TSSOP Package
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
LOAD CURRENT (mA)
1
70
E
72
74
76
78
86
10
100
LT1106 TA02
80
82
84
V
IN
= 5V
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 3.3V
D1 = MBR0530
D1 = 4 BAT54Cs
IN PARALLEL
12V Output Efficiency
12V, 60mA Flash Memory Programming Supply
U
A
O
PPLICATI
TYPICAL
V
CC
VPP1
G1
VPP2
G2
ON/OFF
PGND
GND
SW
AVPP
D
S
BSS84
D
S
BSS84
POWER ON
DALE ILS-3825-01 OR
COILTRONICS CTX02-11238-3
MOTOROLA MBR0530
*
**
LT1106 TA01
12/5
SOFT START
1M
0.1
μ
F
3/5 DETECT
VPP VALID
1
μ
F
D1**
L1*
10
μ
H
0.1
μ
F
4.7
μ
F
TANT
ALUM
VPP1
VPP2
V
CC
3.3V/5V
LT1106
VPP VALID
3/5
12V/60mA
0.1
μ
F
0.1
μ
F
470pF
+
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