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NCP1450A
Technical data
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Technical data
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ON Semiconductor NCP1450A Technical data

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 I
88% at I
• Low Startup Voltage of 0.9 V typical at I
• 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 V
• 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
= 200 mA, VIN = 2.0 V, V
O
= 400 mA, VIN = 3.0 V, V
O
= 2.0 V, L = 10 H, C
IN
= 1.0 mA
O
OUT
OUT OUT
= 220 F)
= 3.0 V = 5.0 V
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5
1
TSOP−5
SN SUFFIX
CASE 483
MARKING DIAGRAM AND
PIN CONNECTIONS
1
CE
G
2
OUT
3
NC
(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.
5
xxxAYWG
EXT
GND
4
Typical Applications
• Personal Digital Assistant (PDA)
• Electronic Games
• Portable Audio (MP3)
• Digital Still Cameras
• Handheld Instruments
© Semiconductor Components Industries, LLC, 2005
December, 2005 − Rev. 7
1 Publication Order Number:
NCP1450A/D
NCP1450A
Á
Á
Á
OUT
NC
GND
V
IN
CE
1
EXT
5
V
OUT
OUT
2
NC
3
GND
NCP1450A
4
Figure 1. Typical Step−up Converter Application
2
Error
Amplifier
+
−
3
Phase
Compensation
Voltage
Reference
Soft−Start
PWM
Controller
180 kHz
Oscillator
Driver
4
EXT 5
PIN FUNCTION DESCRIPTION
Pin # Symbol Pin Description
ÁÁÁ
1
2 3 4 5
CE
ÁÁÁÁ
OUT
NC
GND
EXT
1 CE
Figure 2. Representative Block Diagram
Chip Enable Pin (1) The chip is enabled if a voltage equal to or greater than 0.9 V is applied. (2) The chip is disabled if a voltage less than 0.3 V is applied.
ББББББББББББББББББББББ
(3) The chip is enabled if this pin is left floating. Output voltage monitor pin and also the power supply pin for the device. No internal connection to this pin. Ground pin. External transistor drive pin.
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NCP1450A
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
ORDERING INFORMATION (Note 1)
Output
Device
Voltage
NCP1450ASN19T1
NCP1450ASN19T1G
1.9 V
NCP1450ASN27T1G
NCP1450ASN27T1
2.7 V DAZ
NCP1450ASN30T1
NCP1450ASN30T1G
3.0 V DBA
NCP1450ASN33T1
NCP1450ASN33T1G
3.3 V DBC
NCP1450ASN50T1
NCP1450ASN50T1G
5.0 V DBD
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
1. The ordering information lists five standard output voltage device options. Additional devices with output voltage ranging from
1.8 V to 5.0 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability.
Switching
Frequency
180 KHz
Marking Package Shipping
TSOP−5
DAY
TSOP−5
(Pb−Free)
TSOP−5 TSOP−5
(Pb−Free)
TSOP−5 TSOP−5
(Pb−Free)
3000 Units
on 7 Inch Reel
TSOP−5 TSOP−5
(Pb−Free)
TSOP−5 TSOP−5
(Pb−Free)
†
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Voltage (Pin 2) Input/Output Pins
EXT (Pin 5)
ББББББББББББББББББ
EXT Sink/Source Current
CE (Pin 1)
Input Voltage Range
ББББББББББББББББББ
Input Current Range
Power Dissipation and Thermal Characteristics
ББББББББББББББББББ
Maximum Power Dissipation @ T Thermal Resistance Junction−to−Air
ББББББББББББББББББ
= 25°C
A
Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously . If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.
2. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) $2.0 kV per JEDEC standard: JESD22−A114. Machine Model (MM) $200 V per JEDEC standard: JESD22−A115.
3. Latchup Current Maximum Rating: $150 mA per JEDEC standard: JESD78.
4. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
V
OUT
V
EXT
ÁÁÁ
I
EXT
V
CE
ÁÁÁ
I
CE
ÁÁÁ
P
D
R
JA
ÁÁÁ
T
A
T
J
T
stg
6.0
−0.3 to 6.0
БББББ
−150 to 150
−0.3 to 6.0
БББББ
−150 to 150
БББББ
БББББ
500 250
−40 to +85
−40 to +150
−55 to +150
V
V
ÁÁ
mA
V
ÁÁ
mA
ÁÁ
mW
°C/W
ÁÁ
°C °C °C
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NCP1450A
ELECTRICAL CHARACTERISTICS (For all values T
= 25°C, unless otherwise noted.)
A
Characteristic
OSCILLATOR
Frequency (V
OUT
= V
0.96, Note 5) f
SET
Frequency Temperature Coefficient (TA = −40°C to 85°C) Maximum PWM Duty Cycle (V
OUT
= V
0.96) D
SET
Minimum Startup Voltage (IO = 0 mA) V Minimum Startup Voltage Temperature Coefficient (TA = −40°C to 85°C) Minimum Operation Hold Voltage (IO = 0 mA) V Soft−Start Time (V
OUT
= V
Note 6) t
SET,
CE (PIN 1)
CE Input Voltage (V
OUT
= V
SET
0.96) High State, Device Enabled Low State, Device Disabled
CE Input Current (Note 6)
High State, Device Enabled (V Low State, Device Disabled (V
= VCE = 5.0 V)
OUT
= 5.0 V, VCE = 0 V)
OUT
EXT (PIN 5)
EXT “H” Output Current (V
EXT
= V
OUT
−0.4 V)
Device Suffix:
19T1 27T1 30T1 33T1 50T1
EXT “L” Output Current(V
EXT
= 0.4 V)
Device Suffix:
19T1 27T1 30T1 33T1 50T1
TOTAL DEVICE
Output Voltage
Device Suffix:
19T1 27T1 30T1 33T1
50T1 Output Voltage Temperature Coefficient (TA = −40 to +85°C) Operating Current (V
= VCE = V
OUT
0.96, Note 5)
SET
Device Suffix:
19T1
27T1
30T1
33T1
50T1 Standby Current (V Off−State Current (V
5. V
means setting of output voltage.
SET
6. This parameter is guaranteed by design.
= VCE = V
OUT
= 5.0 V, VCE = 0 V, TA = −40 to +85°C, Note 7) I
OUT
+0.5 V) I
SET
7. CE pin is integrated with an internal 150 nA pullup current source.
Symbol Min Typ Max Unit
144 180 216 kHz
− 0.11 − %/°C
70 80 90 %
− 0.8 0.9 V
− −1.6 − mV/°C
− 0.6 0.7 V
− 100 250 ms
V
OSC
f
MAX
start
start
hold
SS
V
V
CE(high)
V
CE(low)
0.9
−
−
−
−
0.3 A
I
CE(high)
I
CE(low)
I
EXTH
I
EXTL
V
OUT
V
OUT
I
DD
STB OFF
−0.5 0
−
−
−
−
−
20.0
30.0
30.0
30.0
35.0
1.853
2.633
2.925
3.218
4.875
0
0.15
−25.0
−35.0
−37.7
−40.0
−53.7
38.3
48.0
50.8
52.0
58.2
1.9
2.7
3.0
3.3
5.0
0.5
0.5
−20.0
−30.0
−30.0
−30.0
−35.0
−
−
−
−
−
1.948
2.768
3.075
3.383
5.125
− 150 − ppm/°C
−
−
−
−
−
55 93
98 103 136
90 140 150 160 220
− 15 20
− 0.6 1.5
mA
mA
V
A
AA
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NCP1450A
V
, OUTPUT VOLTAGE (V)
EFFICIENCY (%)
0
0
0
2.1
2.0
1.9 V
= 0.9 V V
IN
= 1.2 V V
IN
IN
= 1.5 V
1.8
NCP1450ASN19T1
, OUTPUT VOLTAGE (V)
1.7
OUT
V
1.6
0
400200
L = 10 H Q = NTGS3446T1
= 220 F
C
OUT
T
= 25°C
A
600
800 1000
IO, OUTPUT CURRENT (mA)
Figure 3. NCP1450ASN19T1 Output Voltage
vs. Output Current
5.2
V
= 4.5 V
5.1
V
= 1.2 V
IN
V
= 2.0 V
IN
V
IN
= 4.0 V
IN
5.0
V
= 1.5 V
IN
V
= 2.5 V
IN
V
= 3.0 V
IN
4.9
NCP1450ASN50T1 L = 10 H Q = NTGS3446T1 C
= 220 F
OUT
T
= 25°C
A
OUT
4.8
4.7
V
= 0.9 V
IN
0 600400200 800 1000
IO, OUTPUT CURRENT (mA)
Figure 5. NCP1450ASN50T1 Output Voltage
vs. Output Current
100
V
= 2.0 V
IN
80
V
IN
= 1.5 V
60
40
20
0
0.01 1001010.1 1000
V
= 0.9 V
IN
V
= 1.2 V
IN
IO, OUTPUT CURRENT (mA)
V
= 2.5 V
IN
NCP1450ASN30T1 L = 10 H Q = NTGS3446T1 C
= 220 F
OUT
T
= 25°C
A
3.2
3.1 V
IN
3.0
V
= 0.9 V V
IN
2.9
NCP1450ASN30T1
, OUTPUT VOLTAGE (V) V
L = 10 H Q = NTGS3446T1
2.8
OUT
2.7
= 220 F
C
OUT
T
= 25°C
A
0 600400200 800 100
= 1.2 V
IN
V
= 1.5 V
IN
V
IN
IO, OUTPUT CURRENT (mA)
Figure 4. NCP1450ASN30T1 Output Voltage
vs. Output Current
100
V
= 1.5 V
IN
80
V
= 1.2 V
IN
60
V
= 0.9 V
IN
40
EFFICIENCY (%)
20
0
NCP1450ASN19T1 L = 10 H Q = NTGS3446T1 C
= 220 F
OUT
T
= 25°C
A
0.01 1001010.1 100 IO, OUTPUT CURRENT (mA)
Figure 6. NCP1450ASN19T1 Efficiency vs.
Output Current
100
EFFICIENCY (%)
80
V V V V
= 4.0 V
IN
= 3.0 V
IN
= 2.5 V
IN
= 2.0 V
IN
V
= 4.5 V
IN
V
= 1.2 V
IN
60
V
= 0.9 V
IN
V
IN
40
NCP1450ASN50T1 L = 10 H
20
0
0.01 1001010.1 100
Q = NTGS3446T1 C
= 220 F
OUT
T
= 25°C
A
IO, OUTPUT CURRENT (mA)
= 2.5 V
= 2.0 V
= 1.5 V
Figure 7. NCP1450ASN30T1 Efficiency vs.
Output Current
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Figure 8. NCP1450ASN50T1 Efficiency vs.
Output Current
5
NCP1450A
V
, OUTPUT VOLTAGE (V)
I
, OPERATING CURRENT (
A)
0
0
0
2.1
2.0
1.9
1.8 NCP1450ASN19T1
, OUTPUT VOLTAGE (V)
L = 22 H
1.7
OUT
V
= 0 mA
I
O
V
= 1.2 V
IN
1.6
−50 50250−25 75 100 −50 50250−25 75 10 TEMPERATURE (°C)
Figure 9. NCP1450ASN19T1 Output Voltage
vs. Temperature
3.2
3.1
3.0
2.9
, OUTPUT VOLTAGE (V)
2.8
OUT
V
2.7
NCP1450ASN30T1 L = 22 H
= 0 mA
I
O
V
= 1.2 V
IN
TEMPERATURE (°C)
Figure 10. NCP1450ASN30T1 Output Voltage
vs. Temperature
5.2
5.1
5.0
100
80
60
4.9 NCP1450ASN50T1
L = 22 H
4.8
OUT
4.7
= 0 mA
I
O
V
IN
= 1.2 V
−50 50250−25 75 100 TEMPERATURE (°C)
Figure 11. NCP1450ASN50T1 Output Voltage
vs. Temperature
40
, OPERATING CURRENT (A) I
DD
V
= 1.9 V x 0.96
OUT
Open−Loop Test
NCP1450ASN19T1
20
0
−50 50250−25 75 10 TEMPERATURE (°C)
Figure 12. NCP1450ASN19T1 Operating
Current vs. Temperature
, OPERATING CURRENT (A) I
DD
200
180
160
140
NCP1450ASN50T1
120
V
OUT
Open−Loop Test
100
Figure 14. NCP1450ASN50T1 Operating
= 5.0 V x 0.96
TEMPERATURE (°C)
Current vs. Temperature
140
120
100
80
NCP1450ASN30T1
60
V
= 3.0 V x 0.96
DD
OUT
Open−Loop Test
40
−50 50250−25 75 100 −50 50250−25 75 10 TEMPERATURE (°C)
Figure 13. NCP1450ASN30T1 Operating
Current vs. Temperature
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NCP1450A
I
, STANDBY CURRENT (
A)
I
, OFF−STATE CURRENT (
A)
0
0
0
25
20
15
10
, STANDBY CURRENT (A)
STD
I
NCP1450ASN19T1
5
V
= 1.9 V + 0.5 V
OUT
Open−Loop Test
0
−50 50250−25 75 100 TEMPERATURE (°C)
Figure 15. NCP1450ASN19T1 Standby Current
vs. Temperature
25
20
15
25
20
15
10
, STANDBY CURRENT (A)
STD
I
NCP1450ASN30T1
5
V
= 3.0 V + 0.5 V
OUT
Open−Loop Test
0
−50 50250−25 75 10 TEMPERATURE (°C)
Figure 16. NCP1450ASN30T1 Standby Current
vs. Temperature
1.0 NCP1450ASN19T1
V
= 5.0 V
OUT
0.8
0.6
= 0 V
V
CE
Open−Loop Test
STD
OFF
10
NCP1450ASN50T1
5
V
= 5.0 V + 0.5 V
OUT
Open−Loop Test
0
−50 50250−25 75 100 TEMPERATURE (°C)
Figure 17. NCP1450ASN50T1 Standby Current
vs. Temperature
1.0 NCP1450ASN30T1 V
= 5.0 V
OUT
0.8
= 0 V
V
CE
Open−Loop Test
0.6
0.4
0.2
0.0
−50 50250−25 75 100 TEMPERATURE (°C)
Figure 19. NCP1450ASN30T1 Off−State Current
vs. Temperature
0.4
0.2
, OFF−STATE CURRENT (A)
OFF
I
0.0
−50 50250−25 75 10 TEMPERATURE (°C)
Figure 18. NCP1450ASN19T1 Off−State Current
vs. Temperature
1.2 NCP1450ASN50T1 V
= 5.0 V
OUT
1.0
= 0 V
V
CE
Open−Loop Test
0.8
0.6
0.4
, OFF−STATE CURRENT (A)
OFF
I
0.2
−50 50250−25 75 10 TEMPERATURE (°C)
Figure 20. NCP1450ASN50T1 Off−State Current
vs. Temperature
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