LTC3200-5.pdf 데이터시트 (총 12 페이지) - 파일 다운로드 LTC3200-5 데이타시트 다운로드

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LTC3200/LTC3200-5
Low Noise, Regulated
Charge Pump DC/DC Converters
FEATURES
s Low Noise Constant Frequency Operation
s Output Current: 100mA
s Available in 8-Pin MSOP (LTC3200) and Low
Profile (1mm) 6-Pin ThinSOTTM (LTC3200-5)
Packages
s 2MHz Switching Frequency
s Fixed 5V ± 4% Output (LTC3200-5) or ADJ
s VIN Range: 2.7V to 4.5V
s Automatic Soft-Start Reduces Inrush Current
s No Inductors
Us ICC <1µA in Shutdown
APPLICATIO S
s White LED Backlighting
s Li-Ion Battery Backup Supplies
s Local 3V to 5V Conversion
s Smart Card Readers
s PCMCIA Local 5V Supplies
DESCRIPTIO
The LTC®3200/LTC3200-5 are low noise, constant fre-
quency switched capacitor voltage doublers. They pro-
duce a regulated output voltage from a 2.7V to 4.5V input
with up to 100mA of output current. Low external parts
count (one flying capacitor and two small bypass capaci-
tors at VIN and VOUT) make the LTC3200/LTC3200-5
ideally suited for small, battery-powered applications.
A new charge-pump architecture maintains constant
switching frequency to zero load and reduces both output
and input ripple. The LTC3200/LTC3200-5 have thermal
shutdown capability and can survive a continuous short-
circuit from VOUT to GND. Built-in soft-start circuitry
prevents excessive inrush current during start-up.
High switching frequency enables the use of small ceramic
capacitors. A low current shutdown feature disconnects
the load from VIN and reduces quiescent current to <1µA.
The LTC3200 is available in an 8-pin MSOP package and
the LTC3200-5 is available in a 6-pin ThinSOT.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
Regulated 5V Output from a 2.7V to 4.5V Input
1µF
VIN
2.7V TO 4.5V
1µF
OFF ON
46
CC+
LTC3200-5
51
VIN VOUT
2
GND
1µF
3
SHDN
VOUT = 5V ±4%
IOUT UP TO 40mA, VIN 2.7V
IOUT UP TO 100mA, VIN 3.1V
ALL CAPACITORS = MURATA GRM 39X5R105K6.3AJ
OR TAIYO YUDEN JMK107BJ105MA
3200-5 TA01
Output Ripple Voltage vs Load Current
40
VIN = 3V
CFLY = 1µF
TA = 25°C
30
COUT = 1µF
20
COUT = 2.2µF
10
0
0 25 50 75 100
OUTPUT CURRENT (mA)
3200 TA02
1

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LTC3200/LTC3200-5
ABSOLUTE AXI U RATI GS (Note 1)
VIN to GND ...................................................– 0.3V to 6V
VOUT to GND .............................................– 0.3V to 5.5V
VFB, SHDN to GND ........................ – 0.3V to (VIN + 0.3V)
IOUT (Note 2) ....................................................... 150mA
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
C+ 1
VCIN–
2
3
PGND 4
TOP VIEW
8 VOUT
7 FB
6 SHDN
5 SGND
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 200°C/W
ORDER PART
NUMBER
LTC3200EMS8
MS8 PART MARKING
LTNV
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
LTC3200ES6-5
S6 PART MARKING
LTSH
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range. Specifications are at TA = 25°C, VIN = 3.6V, CFLY = 1µF, CIN = 1µF, COUT = 1µF unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN
VOUT
ICC
ISHDN
VFB
IFB
VR
η
FOSC
VIH
VIL
IIH
IIL
tON
ROL
Input Voltage
Output Voltage
Operating Supply Current
Shutdown Current
FB Voltage (LTC3200)
FB Input Current (LTC3200)
Output Ripple (LTC3200-5)
Efficiency (LTC3200-5)
Switching Frequency
SHDN Input Threshold
SHDN Input Threshold
SHDN Input Current
SHDN Input Current
VOUT Turn-On Time
Open-Loop Output Resistance
2.7V VIN 4.5V, IOUT 40mA
3.1V VIN 4.5V, IOUT 100mA
IOUT = 0mA, SHDN = VIN
SHDN = 0V, VOUT = 0V
VFB = 1.4V
VIN = 3V, IOUT = 100mA
VIN = 3V, IOUT = 50mA
SHDN = VIN
SHDN = 0V
VIN = 3V, IOUT = 0mA, 10% to 90%
VIN = 3V, IOUT = 100mA, VFB = 0V (Note 4)
q 2.7
q 4.8
q 4.8
q
q
q 1.217
q –50
1
q 1.3
q
q –1
q –1
5
5
3.5
1.268
30
80
2
0.8
9.2
4.5
5.2
5.2
8
1
1.319
50
0.4
1
1
V
V
V
mA
µA
V
nA
mVP-P
%
MHz
V
V
µA
µA
ms
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Based on long term current density limitations.
Note 3: The LTC3200E/LTC3200E-5 are 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: ROL (2 VIN – VOUT)/IOUT
2

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LTC3200/LTC3200-5
TYPICAL PERFOR A CE CHARACTERISTICS (LTC3200-5)
Output Voltage vs Supply Voltage
5.15
CIN = COUT = CFLY = 1µF
IOUT = 20mA
5.10
TA = 85°C
5.05
5.00 TA = 25°C
TA = – 40°C
4.95
4.90
4.85
2.7
3.0 3.3 3.6 3.9 4.2 4.5
SUPPLY VOLTAGE (V)
3200 F01
Oscillator Frequency vs Supply
Voltage
3.0
2.8
2.6
2.4 TA = 25°C
2.2 TA = – 40°C
2.0 TA = 85°C
1.8
1.6
1.4
1.2
1.0
2.7
3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
4.5
3200 G04
Output Voltage vs Load Current
5.2
CIN = COUT = CFLY = 1µF
TA = 25°C
5.1
5.0
VIN = 2.7V
4.9
VIN = 3V
VIN = 3.2V
No Load Supply Current vs Supply
Voltage
6
CIN = COUT = CFLY = 1µF
VSHDN = VIN
5 TA = 25°C
TA = 85°C
4
TA = – 40°C
4.8
0
50 100 150
LOAD CURRENT (mA)
200
3200 G02
VSHDN Threshold Voltage vs
Supply Voltage
1.1
1.0
0.9 TA = – 40°C
TA = 25°C
0.8
TA = 85°C
0.7
0.6
0.5
2.7 3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
4.5
3200 G05
Short Circuit Current vs Supply
Voltage
250
CFLY = 1µF
TA = 25°C
VOUT = 0V
200
3
2.7 3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
4.5
3200 G03
Efficiency vs Load Current
100 CIN = COUT = CFLY = 1µF
90 TA = 25°C
VIN = 2.7V
80
VIN = 3.2V
70
VIN = 3.7V
60
VIN = 4.5V
50
40
30
1 10 100
LOAD CURRENT (mA)
3200 G06
150
100
2.7 3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
4.5
3200 G07
3

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LTC3200/LTC3200-5
TYPICAL PERFOR A CE CHARACTERISTICS (LTC3200-5) TA = 25°C
VOUT Soft-Start Ramp
VSHDN
2V/DIV
VOUT
1V/DIV
VIN = 3V
200µs/DIV
Output Ripple
VOUT (AC
COUPLED)
20mV/DIV
COUT = 1µF
COUT = 3.3µF
COUT = 10µF
32005 G08
VIN = 3.3V
IL = 100mA
200ns/DIV
Load Transient Response
IL
10mA TO
90mA
50mA/DIV
VOUT
(AC
COUPLED)
50mV/DIV
32005 G09
VIN = 3.3V
COUT = 1µF
10µs/DIV
32005 G10
PIN FUNCTIONS LTC3200/LTC3200-5
C+ (Pins 1/6): Flying Capacitor Positive Terminal.
VIN (Pins 2/5): Input Supply Voltage. VIN should be
bypassed with a 1µF to 4.7µF low ESR ceramic capacitor.
C(Pins 3/4): Flying Capacitor Negative Terminal.
GND (Pins 4,5/2): Ground. Should be tied to a ground
plane for best performance.
SHDN (Pins 6/3): Active Low Shutdown Input. A low on
SHDN disables the LTC3200/LTC3200-5. SHDN must not
be allowed to float.
FB (Pin 7): (LTC3200 Only) Feedback Input Pin. An output
divider should be connected from VOUT to FB to program
the output voltage.
VOUT (Pins 8/1): Regulated Output Voltage. VOUT should
be bypassed with a 1µF to 4.7µF low ESR ceramic capaci-
tor as close as possible to the pin for best performance.
4

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SI PLIFIED BLOCK DIAGRA S
LTC3200
LTC3200/LTC3200-5
VOUT 8
FB 7
SOFT-START
AND
SWITCH CONTROL
6 SHDN
2MHz
OSCILLATOR
VIN 2
VOUT 1
CHARGE
PUMP
1 C+
3 C
54
SGND PGND
3200 BD
LTC3200-5
SOFT-START
AND
SWITCH CONTROL
3 SHDN
2MHz
OSCILLATOR
VIN 5
CHARGE
PUMP
2
GND
6 C+
4 C
3200-5 BD
5