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PDF LTC3200-5 Data sheet ( Hoja de datos )
| Número de pieza | LTC3200-5 | |
| Descripción | Regulated Charge Pump DC/DC Converters | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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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
C– C+
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
1 page  
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
5 Page 
PACKAGE DESCRIPTIO
LTC3200/LTC3200-5
SOT-23
(Original)
A
.90 – 1.45
(.035 – .057)
A1
.00 – 0.15
(.00 – .006)
A2
.90 – 1.30
(.035 – .051)
L
.35 – .55
(.014 – .021)
SOT-23
(ThinSOT)
1.00 MAX
(.039 MAX)
.01 – .10
(.0004 – .004)
.80 – .90
(.031 – .035)
.30 – .50 REF
(.012 – .019 REF)
S6 Package
6-Lead Plastic ThinSOT-23
(LTC DWG # 05-08-1634)
2.80 – 3.10
(.110 – .118)
(NOTE 3)
2.60 – 3.00
(.102 – .118)
1.50 – 1.75
(.059 – .069)
(NOTE 3)
PIN ONE ID
.20
(.008)
DATUM ‘A’
.95
(.037)
REF
A A2
L
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
.09 – .20
(.004 – .008)
(NOTE 2)
2.
DIMENSIONS
ARE
IN
MILLIMETERS
(INCHES)
3. DRAWING NOT TO SCALE
4. DIMENSIONS ARE INCLUSIVE OF PLATING
5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
6. MOLD FLASH SHALL NOT EXCEED .254mm
7. PACKAGE EIAJ REFERENCE IS:
SC-74A (EIAJ) FOR ORIGINAL
JEDEL MO-193 FOR THIN
1.90
(.074)
REF
.25 – .50
(.010 – .020)
(6PLCS, NOTE 2)
A1
S6 SOT-23 0401
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC3200-5.PDF ] | |
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