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Linear Technology Electronic Components Datasheet

LT1106 Datasheet

Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory

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LT1106
Micropower Step-Up
DC/DC Converter for
PCMCIA Card Flash Memory
FEATURES
s 60mA Output Current at 12V from 3V Supply
s Shutdown to 10µA
s Programmable 12V or 5V Output
s Up to 85% Efficiency
s Quiescent Current: 750µA
s Low VCESAT Switch: 300mV at 0.5A Typical
s Uses Low Value, Thin, Surface Mount Inductors
s Ultra-Thin 20-Lead TSSOP Package
APPLICATI S
s PCMCIA Card Flash Memory VPP Generator
s Portable Computers
s Portable Instruments
s DC/DC Converter Module Replacements
DESCRIPTIO
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 ModeTM 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 1µF of output capacitance.
Quiescent current is 750µA which drops to 350µA when
the card runs off the socket supply. The shutdown pin
reduces supply current to only 10µA. The device includes
a soft start feature which limits supply current transients
when the card is inserted into a hot socket.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATI
12V, 60mA Flash Memory Programming Supply
VCC
3.3V/5V +
VPP1
VPP2
4.7µF
TANT
ALUM
0.1µF
0.1µF
D
BSS84
S
0.1µF D
BSS84
S
POWER ON
*DALE ILS-3825-01 OR
COILTRONICS CTX02-11238-3
**MOTOROLA MBR0530
L1*
10µH
D1**
VCC
VPP1
SW
AVPP
G1 LT1106
VPP2 VPP VALID
G2 3/5 DETECT
SOFT START
ON/OFF
PGND GND 12/5
1M
1µF
470pF
12V/60mA
VPP VALID
3/5
0.1µF
LT1106 • TA01
12V Output Efficiency
86
84
D1 = MBR0530
D1 = 4 BAT54Cs
VIN = 5V
IN PARALLEL
82
VIN = 5V
80
VIN = 3.3V
78
76 VIN = 3.3V
74
72
70
1
10
LOAD CURRENT (mA)
100
LT1106 • TA02
1


Linear Technology Electronic Components Datasheet

LT1106 Datasheet

Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory

No Preview Available !

LT1106
ABSOLUTE AXI U RATI GS
VCC Voltage ............................................................... 7V
VSW Voltage ............................................................ 20V
AVPP Voltage ......................................................... 20V
VPP1, VPP2 Voltage ............................................... 20V
G1, G2 Voltage ....................................................... 20V
VON/OFF Voltage......................................................... 7V
VSEL Voltage ............................................................. 7V
ILIM Voltage .............................................................. 7V
Maximum Power Dissipation ............................ 500mW
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SELECT 12/5 1
SOFT START 2
VCC 3
VCC 4
3/5 5
PGND 6
PGND 7
NC 8
VSW 9
VSW 10
20 ON/OFF
19 AVPP
18 VPP1
17 VPP2
16 G1
15 G2
14 VPP VALID
13 GND
12 NC
11 VSW
F PACKAGE
20-LEAD PLASTIC TSSOP
TJMAX = 100°C, θJA = 90°C/W
ORDER PART
NUMBER
LT1106CF
Consult factory for Industrial and Military grade parts
ELECTRICAL CHARACTERISTICS TA = 25°C, VCC = 5V, VON/OFF = 3V, unless otherwise noted.
SYMBOL
IQ
fOSC
DC
tON
VCESAT
PARAMETER
Quiescent Current
Quiescent Current, Shutdown
“Doze” Mode Current
Input Voltage Range
Output Sense Voltage
Output Referred
Comparator Hysteresis
Oscillator Frequency
Maximum Duty Cycle
Switch On-Time
Reference Line Regulation
Switch Saturation Voltage
Switch Leakage Current
Switch Current Limit
Soft Start Pin Current
Select Input Voltage Low
Select Input Voltage High
ON/OFF Input Voltage Low
ON/OFF Input Voltage High
ON/OFF Bias Current
CONDITIONS
VSEL = 0.2V, AVPP = 12V
VON/OFF = 0.2V
VSEL = 0.2V, VPP1 or VPP2 = 12V
VSEL = 3V, VPP1 and VPP2 Floating
VSEL = 0.2V, VPP1 and VPP2 Floating
VSEL = 3V
VSEL = 0.2V
Current Limit Not Asserted
2V < VIN < 6V
ISW = 0.5A
VSW = 12V, Switch Off
VIN = 5V, Soft Start Floating
VIN = 3V, Soft Start Floating
Soft Start Grounded
VON/OFF = 5V
VON/OFF = 3V
VON/OFF = 0V
MIN TYP MAX
750 900
9 15
320
26
q 4.75 5
5.25
q 11.50 12 12.60
15
35
400 500 700
q 80 85 92
1.7
0.06 0.15
230 350
0.1 10
450 600 900
500 650 950
80 120
0.8
1.6
0.8
1.6
16.0 24.0
8.0 14.0
0.1 1.1
UNITS
µA
µA
µA
V
V
V
mV
mV
kHz
%
µs
%/V
mV
µA
mA
mA
µA
V
V
V
V
µA
µA
µA
2


Part Number LT1106
Description Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory
Maker Linear Technology
Total Page 8 Pages
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