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LTC1754-5 Datasheet

Micropower/ Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23

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LTC1754-5 pdf
LTC1754-3.3/LTC1754-5
Micropower, Regulated
3.3V/5V Charge Pump with
Shutdown in SOT-23
FEATURES
s Ultralow Power: IIN = 13µA
s Regulated Output Voltage: 3.3V ±4%, 5V ±4%
s 5V Output Current: 50mA (VIN 3.0V)
s 3.3V Output Current: 40mA (VIN 2.5V)
s No Inductors Needed
s Very Low Shutdown Current: <1µA
s Shutdown Disconnects Load from VIN
s Internal Oscillator: 600kHz
s Short-Circuit and Overtemperature Protected
s Ultrasmall Application Circuit: (0.052 Inch2)
s 6-Pin SOT-23 Package
U
APPLICATIO S
s SIM Interface Supplies for GSM Cellular Telephones
s White LED Power Supplies
s Li-Ion Battery Backup Supplies
s Handheld Computers
s Smart Card Readers
s PCMCIA Local 5V Supplies
DESCRIPTIO
The LTC®1754 is a micropower charge pump DC/DC
converter that produces a regulated output. The input
voltage range is 2V to 4.4V for 3.3V output and 2.7V to
5.5V for 5V output. Extremely low operating current and a
low external parts count (one flying capacitor and two
small bypass capacitors at VIN and VOUT) make the LTC1754
ideally suited for small, battery-powered applications. The
total component area of the application circuit shown
below is only 0.052 inch2.
The LTC1754 operates as a Burst ModeTM switched capaci-
tor voltage doubler to produce a regulated output. It has
thermal shutdown capability and can survive a continuous
short circuit from VOUT to GND.
The LTC1754 is available in a 6-pin SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
VOUT
10µF
ON/OFF
1
VOUT
C+ 6
LTC1754-X
25
GND VIN
3 SHDN C 4
1µF
VIN
10µF
1754 TA01
Regulated 3.3V Output from 2V to 4.4V Input
VOUT = 3.3V ± 4%
IOUT = 0mA TO 20mA, VIN > 2.0V
IOUT = 0mA TO 40mA, VIN > 2.5V
Regulated 5V Output from 2.7V to 5.5V Input
VOUT = 5V ± 4%
IOUT = 0mA TO 25mA, VIN > 2.7V
IOUT = 0mA TO 50mA, VIN > 3.0V
LTC1754-3.3
Output Voltage vs Supply Voltage
3.40
IOUT = 20mA
COUT = 10µf
CFLY = 1µF
3.35
TA = 85°C
3.30 TA = 25°C
TA = –40°C
3.25
3.20
2.0
2.5 3.0 3.5 4.0
SUPPLY VOLTAGE (V)
4.5
1754 TA02
LTC1754-5
Output Voltage vs Supply Voltage
5.15
IOUT = 25mA
COUT = 10µF
5.10 CFLY = 1µF
5.05
TA = 25°C
5.00
4.95
TA = 85°C
TA = –40°C
4.90
4.85
2.5
3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
5.0 5.5
1574 TA03
1


Linear Technology Electronic Components Datasheet

LTC1754-5 Datasheet

Micropower/ Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23

No Preview Available !

LTC1754-5 pdf
LTC1754-3.3/LTC1754-5
ABSOLUTE AXI U RATI GS
(Note 1)
VIN to GND .................................................. – 0.3V to 6V
VOUT to GND ............................................... – 0.3V to 6V
SHDN to GND .............................................. – 0.3V to 6V
IOUT (Note 4) ......................................................... 75mA
VOUT Short-Circuit Duration ............................ Indefinite
Operating Temperature Range (Note 3) ... – 40°C to 85°C
Storage Temperature Range .................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
VOUT 1
GND 2
SHDN 3
TOP VIEW
6 C+
5 VIN
4 C
S6 PACKAGE
6-LEAD PLASTIC SOT-23
TJMAX = 150°C, θJA = 230°C/ W
ORDER PART
NUMBER
LTC1754ES6-3.3
LTC1754ES6-5
S6 PART MARKING
LTGK
LTLW
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. CFLY = 1µF (Note 2), CIN = 10µF, COUT = 10µF.
SYMBOL PARAMETER
LTC1754-3.3
VIN Input Supply Voltage
VOUT Output Voltage
ICC
VR
η
fOSC
tON
ISC
LTC1754-5
VIN
VOUT
Operating Supply Current
Output Ripple
Efficiency
Switching Frequency
VOUT Turn-On Time
Output Short-Circuit Current
Input Supply Voltage
Output Voltage
ICC Operating Supply Current
VR Output Ripple
η Efficiency
fOSC Switching Frequency
tON VOUT Turn-On Time
ISC Output Short-Circuit Current
LTC1754-3.3/LTC1754-5
ISHDN
Shutdown Supply Current
VIH SHDN Input Threshold (High)
VIL SHDN Input Threshold (Low)
IIH SHDN Input Current (High)
IIL SHDN Input Current (Low)
CONDITIONS
MIN TYP MAX
q 2.0
4.4
2.0V VIN 4.4V, IOUT 20mA
2.5V VIN 4.4V, IOUT 40mA
q 3.17 3.30 3.43
q 3.17 3.30 3.43
2.0V VIN 4.4V, IOUT = 0mA, SHDN = VIN q
11 30
VIN = 2.5V, IOUT = 40mA
23
VIN = 2.0V, IOUT = 20mA
82
Oscillator Free Running
600
VIN = 2.0V, IOUT = 0mA
VIN = 2.5V, VOUT = 0V, SHDN = 2.5V
0.8
118
q 2.7
5.5
2.7V VIN 5.5V, IOUT 25mA
3.0V VIN 5.5V, IOUT 50mA
q 4.8 5.0 5.2
q 4.8 5.0 5.2
2.7V VIN 5.5V, IOUT = 0mA, SHDN = VIN q
13 30
VIN = 3V, IOUT = 50mA
65
VIN = 3V, IOUT = 50mA
82.7
Oscillator Free Running
700
VIN = 3V, IOUT = 0mA
VIN = 3V, VOUT = 0V, SHDN = 3V
0.4
150
VIN 3.6V, IOUT = 0mA, VSHDN = 0V
3.6V < VIN, IOUT = 0mA, VSHDN = 0V
SHDN = VIN
SHDN = 0V
q 0.01 1
q 2.5
q 1.4
q 0.3
q –1
1
q –1
1
UNITS
V
V
V
µA
mVP-P
%
kHz
ms
mA
V
V
V
µA
mVP-P
%
kHz
ms
mA
µA
µA
V
V
µA
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: 0.6µF is the minimum required CFLY capacitance for rated output
current capability. Depending on the choice of capacitor material, a
somewhat higher value of capacitor may be required to attain 0.6µF over
temperature.
Note 3: The LTC1754ES6-X is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4: Based on long term current density limitations.
2


Part Number LTC1754-5
Description Micropower/ Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23
Maker Linear Technology
Total Page 12 Pages
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1 LTC1754-3.3 Micropower/ Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23 Linear Technology
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2 LTC1754-5 Micropower/ Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23 Linear Technology
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