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CD54-470L Schematic ( PDF Datasheet ) - ON Semiconductor

Teilenummer CD54-470L
Beschreibung 200 mA/ PFM Step-Up Micropower Switching Regulator
Hersteller ON Semiconductor
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Gesamt 18 Seiten
CD54-470L Datasheet, Funktion
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






CD54-470L Datasheet, Funktion
NCP1402
2.1 3.2
2.0 3.1
1.9 3.0
1.8 2.9
1.7 NCP1402SN19T1
VOUT = 1.9 V x 0.96
Open−Loop Test
1.6
−50
−25
0
25
50
TEMPERATURE (°C)
75 100
Figure 9. NCP1402SN19T1 Output Voltage vs.
Temperature
2.8 NCP1402SN30T1
VOUT = 3.0 V x 0.96
Open−Loop Test
2.7
−50
−25
0
25
50
TEMPERATURE (°C)
75 100
Figure 10. NCP1402SN30T1 Output Voltage vs.
Temperature
5.2
NCP1402SN50T1
VOUT = 5.0 V x 0.96
5.1 Open−Loop Test
5.0
100
NCP1402SN19T1
VOUT = 1.9 V x 0.96
80 Open−Loop Test
60
4.9 40
4.8 20
4.7
−50
−25
0 25 50
TEMPERATURE (°C)
75 100
Figure 11. NCP1402SN50T1 Output Voltage vs.
Temperature
0
−50 −25
0
25 50
TEMPERATURE (°C)
75 100
Figure 12. NCP1402SN19T1 Operating
Current 1 vs. Temperature
100
NCP1402SN30T1
VOUT = 3.0 V x 0.96
80 Open−Loop Test
100
NCP1402SN50T1
VOUT = 5.0 V x 0.96
80 Open−Loop Test
60 60
40 40
20 20
0
−50 −25
0 25 50
TEMPERATURE (°C)
75
Figure 13. NCP1402SN30T1 Operating
Current 1 vs. Temperature
100
0
−50 −25
0 25 50
TEMPERATURE (°C)
75 100
Figure 14. NCP1402SN50T1 Operating
Current 1 vs. Temperature
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CD54-470L pdf, datenblatt
NCP1402
Vin = 1.2 V, L = 47 mH, COUT = 68 mF
1. VOUT = 1.9 V (AC coupled), 100 mV/div
2. IO = 0.1 mA to 80 mA
Figure 45. NCP1402SN19T1 Load Transient
Response
Vin = 1.2 V, L = 47 mH, COUT = 68 mF
1. VOUT = 1.9 V (AC coupled), 100 mV/div
2. IO = 80 mA to 0.1 mA
Figure 46. NCP1402SN19T1 Load Transient
Response
Vin = 1.5 V, L = 47 mH, COUT = 68 mF
1. VOUT = 3.0 V (AC coupled), 100 mV/div
2. IO = 0.1 mA to 80 mA
Figure 47. NCP1402SN30T1 Load Transient
Response
Vin = 1.5 V, L = 47 mH, COUT = 68 mF
1. VOUT = 3.0 V (AC coupled), 100 mV/div
2. IO = 80 mA to 0.1 mA
Figure 48. NCP1402SN30T1 Load Transient
Response
Vin = 2.4 V, L = 47 mH, COUT = 68 mF
1. VOUT = 5.0 V (AC coupled), 100 mV/div
2. IO = 0.1 mA to 80 mA
Figure 49. NCP1402SN50T1 Load Transient
Response
Vin = 2.4 V, L = 47 mH, COUT = 68 mF
1. VOUT = 5.0 V (AC coupled), 100 mV/div
2. IO = 80 mA to 0.1 mA
Figure 50. NCP1402SN50T1 Load Transient
Response
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