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PDF NCP1450A Data sheet ( Hoja de datos )
| Número de pieza | NCP1450A | |
| Descripción | PWM Step-up DC-DC Controller | |
| Fabricantes | ON | |
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NCP1450A
PWM Step−up DC−DC
Controller
The NCP1450A series are PWM step−up DC−DC switching
controller that are specially designed for powering portable equipment
from one or two cells battery packs. The NCP1450A series have a
driver pin, EXT pin, for connecting to an external transistor. Large
output currents can be obtained by connecting a low ON−resistance
external power transistor to the EXT pin. The device will
automatically skip switching cycles under light load condition to
maintain high efficiency at light loads. With only six external
components, this series allows a simple means to implement highly
efficient converter for large output current applications.
Each device consists of an on−chip Pulse Width Modulation (PWM)
oscillator, PWM controller, phase−compensated error amplifier,
soft−start, voltage reference, and driver for driving external power
transistor. Additionally, a chip enable feature is provided to power
down the converter for extended battery life.
The NCP1450A device series are available in the TSOP−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
• High Efficiency 86% at IO = 200 mA, VIN = 2.0 V, VOUT = 3.0 V
88% at IO = 400 mA, VIN = 3.0 V, VOUT = 5.0 V
• Low Startup Voltage of 0.9 V typical at IO = 1.0 mA
• Operation Down to 0.6 V
• Five Standard Voltages: 1.9 V, 2.7 V, 3.0 V, 3.3 V, 5.0 V with High
Accuracy ± 2.5%
• Low Conversion Ripple
• High Output Current up to 1000 mA
(3.0 V version at VIN = 2.0 V, L = 10 mH, COUT = 220 mF)
• Fixed Frequency Pulse Width Modulation (PWM) at 180 kHz
• Chip Enable Pin with On−chip 150 nA Pullup Current Source
• Low Profile and Micro Miniature TSOP−5 Package
• Pb−Free Packages are Available
Typical Applications
• Personal Digital Assistant (PDA)
• Electronic Games
• Portable Audio (MP3)
• Digital Still Cameras
• Handheld Instruments
http://onsemi.com
5
1
TSOP−5
SN SUFFIX
CASE 483
MARKING DIAGRAM AND
PIN CONNECTIONS
CE 1
OUT 2
NC 3
5 EXT
4 GND
(Top View)
xxx =Specific Device Marking
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 3 of this data sheet.
© Semiconductor Components Industries, LLC, 2005
December, 2005 − Rev. 7
1
Publication Order Number:
NCP1450A/D
1 page  
NCP1450A
2.1 3.2
2.0
1.9
1.8
1.7
1.6
0
VIN = 0.9 V
VIN = 1.2 V
VIN = 1.5 V
NCP1450ASN19T1
L = 10 mH
Q = NTGS3446T1
COUT = 220 mF
TA = 25°C
200 400 600 800
IO, OUTPUT CURRENT (mA)
1000
Figure 3. NCP1450ASN19T1 Output Voltage
vs. Output Current
3.1
VIN = 2.5 V
3.0
VIN = 0.9 V VIN = 1.2 V
VIN = 2.0 V
2.9
NCP1450ASN30T1
VIN = 1.5 V
L = 10 mH
2.8 Q = NTGS3446T1
COUT = 220 mF
TA = 25°C
2.7
0 200
400
600 800 1000
IO, OUTPUT CURRENT (mA)
Figure 4. NCP1450ASN30T1 Output Voltage
vs. Output Current
5.2
5.1
VIN = 1.2 V VIN = 2.0 V
VIN = 4.5 V
VIN = 4.0 V
5.0
VIN = 1.5 V
4.9
VIN = 0.9 V
4.8
4.7
0
200
VIN = 2.5 V VIN = 3.0 V
NCP1450ASN50T1
L = 10 mH
Q = NTGS3446T1
COUT = 220 mF
TA = 25°C
400 600 800 1000
IO, OUTPUT CURRENT (mA)
Figure 5. NCP1450ASN50T1 Output Voltage
vs. Output Current
100
80
VIN = 1.2 V
VIN = 1.5 V
60
40
20
0
0.01
VIN = 0.9 V
NCP1450ASN19T1
L = 10 mH
Q = NTGS3446T1
COUT = 220 mF
TA = 25°C
0.1 1
10 100 1000
IO, OUTPUT CURRENT (mA)
Figure 6. NCP1450ASN19T1 Efficiency vs.
Output Current
100
VIN = 2.0 V
80 VIN = 1.5 V
60
VIN = 2.5 V
40
20
0
0.01
VIN = 1.2 V
VIN = 0.9 V
0.1 1
NCP1450ASN30T1
L = 10 mH
Q = NTGS3446T1
COUT = 220 mF
TA = 25°C
10 100 1000
IO, OUTPUT CURRENT (mA)
Figure 7. NCP1450ASN30T1 Efficiency vs.
Output Current
100
VIN = 4.0 V
VIN = 3.0 V
80 VIN = 2.5 V
VIN = 2.0 V
60
VIN = 4.5 V
VIN = 1.2 V
VIN = 0.9 V VIN = 1.5 V
40
20
0
0.01
0.1
1
NCP1450ASN50T1
L = 10 mH
Q = NTGS3446T1
COUT = 220 mF
TA = 25°C
10 100 1000
IO, OUTPUT CURRENT (mA)
Figure 8. NCP1450ASN50T1 Efficiency vs.
Output Current
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5
5 Page 
NCP1450A
1.0 1.0
0.8
0.6
NCP1450ASN19T1
L = 22 mH
0.4 COUT = 0.1 mF
IO = 0 mA
0.2
Vstart
Vhold
0.8
0.6
NCP1450ASN30T1
L = 22 mH
COUT = 0.1 mF
0.4 IO = 0 mA
0.2
Vstart
Vhold
0.0
−50
−25
0
25 50 75 100
TEMPERATURE (°C)
Figure 39. NCP1450ASN19T1 Startup/Hold
Voltage vs. Temperature
0.0
−50
−25
0
25 50 75 100
TEMPERATURE (°C)
Figure 40. NCP1450ASN30T1 Startup/Hold
Voltage vs. Temperature
1.0
0.8 Vstart
0.6
0.4 Vhold
NCP1450ASN50T1
0.2 L = 22 mH
COUT = 0.1 mF
IO = 0 mA
0.0
−50 −25
0
25 50 75 100
TEMPERATURE (°C)
Figure 41. NCP1450ASN50T1 Startup/Hold
Voltage vs. Temperature
200
180
NCP1450ASN19T1
L = 10 mH
160 Q = NTGS3446T1
140 COUT = 220 mF
TA = 25°C
120
100 VIN = 0.9 V
80
60
40
20
0
0 200 400
VIN = 1.2 V
600
VIN = 1.5 V
800 1000
IO, OUTPUT CURRENT (mA)
Figure 42. NCP1450ASN19T1 Ripple Voltage
vs. Output Current
200
NCP1450ASN30T1
180 L = 10 mH
160 Q = NTGS3446T1
140 COUT = 220 mF
TA = 25°C
120
VIN = 1.2 V
VIN = 1.5 V
100 VIN = 0.9 V
80
60
40
20
VIN = 2.5 V
VIN = 2.0 V
0
0 200 400 600 800 1000
IO, OUTPUT CURRENT (mA)
Figure 43. NCP1450ASN30T1 Ripple Voltage
vs. Output Current
200
180
VIN = 2.0 V
NCP1450ASN50T1
L = 10 mH
160 Q = NTGS3446T1
140 VIN = 0.9 V
120 VIN = 1.2 V
VIN = 2.5 V COUT = 220 mF
TA = 25°C
100 VIN = 1.5 V
80
VIN = 3.0 V
60
VIN = 4.5 V
40
20 VIN = 4.0 V
0
0 200 400 600 800 1000
IO, OUTPUT CURRENT (mA)
Figure 44. NCP1450ASN50T1 Ripple Voltage
vs. Output Current
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11
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| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet NCP1450A.PDF ] | |
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