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PDF CD54-470L Data sheet ( Hoja de datos )
| Número de pieza | CD54-470L | |
| Descripción | 200 mA/ PFM Step-Up Micropower Switching Regulator | |
| Fabricantes | ON Semiconductor | |
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NCP1402
200 mA, PFM Step−Up
Micropower Switching
Regulator
The NCP1402 series are monolithic micropower step−up DC to DC
converter that are specially designed for powering portable equipment
from one or two cell battery packs.These devices are designed to
start−up with a cell voltage of 0.8 V and operate down to less than
0.3 V. With only three external components, this series allow a simple
means to implement highly efficient converters that are capable of up
to 200 mA of output current at Vin = 2.0 V, VOUT = 3.0 V.
Each device consists of an on−chip PFM (Pulse Frequency
Modulation) oscillator, PFM controller, PFM comparator, soft−start,
voltage reference, feedback resistors, driver, and power MOSFET
switch with current limit protection. Additionally, a chip enable
feature is provided to power down the converter for extended battery
life.
The NCP1402 device series are available in the Thin SOT−23−5
package with five standard regulated output voltages. Additional
voltages that range from 1.8 V to 5.0 V in 100 mV steps can be
manufactured.
Features
• Extremely Low Start−Up Voltage of 0.8 V
• Operation Down to Less than 0.3 V
• High Efficiency 85% (Vin = 2.0 V, VOUT = 3.0 V, 70 mA)
• Low Operating Current of 30 mA (VOUT = 1.9 V)
• Output Voltage Accuracy ± 2.5%
• Low Converter Ripple with Typical 30 mV
• Only Three External Components Are Required
• Chip Enable Power Down Capability for Extended Battery Life
• Micro Miniature Thin SOT−23−5 Packages
Typical Applications
• Cellular Telephones
• Pagers
• Personal Digital Assistants (PDA)
• Electronic Games
• Portable Audio (MP3)
• Camcorders
• Digital Cameras
• Handheld Instruments
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5
1
SOT23−5
(TSOP−5, SC59−5)
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
CE 1
OUT 2
NC 3
5 LX
4 GND
xxx = Marking
Y = Year
W = Work Week
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 3 of this data sheet.
© Semiconductor Components Industries, LLC, 2003
November, 2003 − Rev. 5
1
Publication Order Number:
NCP1402/D
1 page  
NCP1402
2.1
NCP1402SN19T1
L = 47 µH
2.0 TA = 25°C
1.9
Vin = 0.9 V
Vin = 1.5 V
1.8 Vin = 1.2 V
1.7
4.0
NCP1402SN30T1
L = 47 µH
3.5 TA = 25°C
3.0
Vin = 0.9 V
Vin = 1.5 V
2.5 Vin = 1.2 V
Vin = 2.5 V
Vin = 2.0 V
2.0
1.6
0 20 40 60 80 100 120 140 160 180 200
IO, OUTPUT CURRENT (mA)
Figure 3. NCP1402SN19T1 Output Voltage vs.
Output Current
1.5
0 20 40 60 80 100 120 140 160 180 200
IO, OUTPUT CURRENT (mA)
Figure 4. NCP1402SN30T1 Output Voltage vs.
Output Current
6.0
5.0
4.0 Vin = 1.2 V
Vin = 0.9 V
3.0
Vin = 1.5 V
Vin = 4.0 V
Vin = 2.0 V
Vin = 3.0 V
100
80 Vin = 1.5 V
60
Vin = 0.9 V Vin = 1.2 V
40
2.0 NCP1402SN50T1
L = 47 µH
TA = 25°C
1.0
0 20 40 60 80 100 120 140 160 180 200
IO, OUTPUT CURRENT (mA)
Figure 5. NCP1402SN50T1 Output Voltage vs.
Output Current
20 NCP1402SN19T1
L = 47 µH
TA = 25°C
0
0 20 40 60 80 100 120 140 160 180 200
IO, OUTPUT CURRENT (mA)
Figure 6. NCP1402SN19T1 Efficiency vs.
Output Current
100
80
60
Vin = 0.9 V
40
Vin = 1.2 V
Vin = 2.5 V
Vin = 2.0 V
Vin = 1.5 V
100
80
Vin = 1.2 V
60
Vin = 0.9 V
40
Vin = 1.5 V
Vin = 4.0 V
Vin = 3.0 V
Vin = 2.0 V
20 NCP1402SN30T1
L = 47 µH
TA = 25°C
0
0 20 40 60 80 100 120 140 160 180 200
IO, OUTPUT CURRENT (mA)
Figure 7. NCP1402SN30T1 Efficiency vs.
Output Current
20 NCP1402SN50T1
L = 47 µH
TA = 25°C
0
0 20 40 60 80 100 120 140 160 180 200
IO, OUTPUT CURRENT (mA)
Figure 8. NCP1402SN50T1 Efficiency vs.
Output Current
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5
5 Page 
NCP1402
5 ms/div
VOUT = 1.9 V, Vin = 1.2 V, IO = 30 mA, L = 47 mH, COUT = 68 mF
1. VLX, 1.0 V/div
2. VOUT, 20 mV/div, AC coupled
3. IL, 100 mA/div
Figure 39. NCP1402SN19T1 Operating
Waveforms (Medium Load)
5 ms/div
VOUT = 1.9 V, Vin = 1.2 V, IO = 70 mA, L = 47 mH, COUT = 68 mF
1. VLX, 1.0 V/div
2. VOUT, 20 mV/div, AC coupled
3. IL, 100 mA/div
Figure 40. NCP1402SN19T1 Operating
Waveforms (Heavy Load)
2 ms/div
VOUT = 3.0 V, Vin = 1.2 V, IO = 30 mA, L = 47 mH, COUT = 68 mF
1. VLX, 2.0 V/div
2. VOUT, 20 mV/div, AC coupled
3. IL, 100 mA/div
Figure 41. NCP1402SN30T1 Operating
Waveforms (Medium Load)
2 ms/div
VOUT = 3.0 V, Vin = 1.2 V, IO = 70 mA, L = 47 mH, COUT = 68 mF
1. VLX, 2.0 V/div
2. VOUT, 20 mV/div, AC coupled
3. IL, 100 mA/div
Figure 42. NCP1402SN30T1 Operating
Waveforms (Heavy Load)
2 ms/div
VOUT = 5.0 V, Vin = 1.5 V, IO = 30 mA, L = 47 mH, COUT = 68 mF
1. VLX, 2.0 V/div
2. VOUT, 20 mV/div, AC coupled
3. IL, 100 mA/div
Figure 43. NCP1402SN50T1 Operating
Waveforms (Medium Load)
2 ms/div
VOUT = 5.0 V, Vin = 1.5 V, IO = 60 mA, L = 47 mH, COUT = 68 mF
1. VLX, 2.0 V/div
2. VOUT, 20 mV/div, AC coupled
3. IL, 100 mA/div
Figure 44. NCP1402SN50T1 Operating
Waveforms (Heavy Load)
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11
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| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet CD54-470L.PDF ] | |
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