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PDF NCP1512 Data sheet ( Hoja de datos )
| Número de pieza | NCP1512 | |
| Descripción | PWM Buck Converter | |
| Fabricantes | ON Semiconductor | |
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NCP1512
Advance Information
PWM Buck Converter with a
Very Low Iq During Low
Load Conditions
The NCP1512 is a tri-mode regulator that operates either as a
Synchronized PWM Buck Converter, PWM Buck Converter with
internal oscillator or as a Pulsed Switching Regulator. If a
synchronization signal is present, the NCP1512 operates as a current
mode PWM converter with synchronous rectification. The optional
external frequency input signal allows the user to control the location
of the spurious frequency noise generated by a PWM converter. The
Pulsed Switching Regulator mode is active when the Sync Pin is
Low. The Pulsed Mode is an extremely low quiescent current Buck
Converter. NCP1512 operates in a PWM mode with an internal
oscillator when the Sync Pin is held high. The NCP1512
configuration allows the flexibility of efficient high power operation
and low input current during system sleep modes.
Features
• Synchronous Rectification for Higher Efficiency in PWM Mode
• Pulsed Switching Mode Operation for Low Current Consumption at
Low Loads
• Integrated MOSFETs and Feedback Circuits
• Cycle -by-Cycle Current Limit
• Automatic Switching Between PWM, with External or Internal
Oscillator, and Pulsed Mode
• Operating Frequency Range of 450 to 1000 kHz
• Internal 1.0 MHz Oscillator
• Thermal Limit Protection
• Built -in Slope Compensation for Current Mode PWM Converter
• 2.5, 2.85, 3.0, 3.3 Fixed Output Voltages
• Shutdown Current Consumption of 0.2 mA
• Pb Free Package for Green Manufacturing
Applications
• Cellular Phones and Pagers
• PDA
• Digital Cameras
• Supplies for DSP Cores
• Portable Applications
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
http://onsemi.com
MARKING
DIAGRAM
9 PIN
MICRO BUMP
FC SUFFIX
CASE 499E
XXXX
YYWW
1
XX = Device Code
YY = Year
WW = Work Week
PIN CONNECTIONS
Pin: A1. - GNDP
A1 B1 C1
A2. - LX
A3. - VCC
B1. - SYNC
A2 B2 C2
B2. - GNDA
B3. - FB
C1. - SHD
A3 B3 C3
C2. - CB1
C3. - CB0
(Bottom View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1512FCT1G 9 Pin Pb Free
Micro Bump
TBD
© Semiconductor Components Industries, LLC, 2003
June, 2003 - Rev. 0
1
Publication Order Number:
NCP1512/D
1 page  
NCP1512
ELECTRICAL CHARACTERISTICS (continued) (Vin = 3.6 V, Vo = 3.0 V, TA = 25°C, Fsyn = 600 kHz 50% Duty Cycle square wave
for PWM mode; TA = –30 to 85°C for Min/Max values, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max Unit
Sync PWM Mode Characteristics (continued)
Feedback Voltage Accuracy, Vout Set = 2.5 V CB0 = L, CB1 = L
Feedback Voltage Accuracy, Vout Set = 2.85 V CB0 = L, CB1 = H
Feedback Voltage Accuracy, Vout Set = 3.0 V CB0 = H, CB1 = H
Feedback Voltage Accuracy, Vout Set = 3.3 V CB0 = H CB1 = L
Load Transient Response
10 to 100 mA Load Step
Vout
2.425
2.500
2.575
V
Vout
2.764
2.850
2.936
V
Vout
2.910
3.000
3.090
V
Vout
3.201
3.300
3.399
V
Vout - 25 - mV
Line Transient Response, Iout = 100 mA
3.0 to 3.6 Vin Line Step
Vout - "5.0 - mVpp
PWM Mode with Internal Oscillator Characteristics
Switching P-FET Current Limit
Duty Cycle
Minimum On Time
I lim
DC
Ton min
-
-
-
800 -
mA
- 100 %
75 - nsec
Internal Oscillator Frequency
Rdson Switching P-FET and N_FET
Switching P-FET and N-FET Leakage Current
Output Overvoltage Threshold
Fosc
Rdson
Ileak
Vo
800
1000
1240
kHz
- 0.23 -
W
- 0 10 mA
- 5.0 -
%
Feedback Voltage Accuracy, Vout Set = 2.5 V CB0 = L, CB1 = L
Feedback Voltage Accuracy, Vout Set = 1.3 V CB0 = L, CB1 = H
Feedback Voltage Accuracy, Vout Set = 1.5 V CB0 = H, CB1 = H
Feedback Voltage Accuracy, Vout Set = 1.89 V CB0 = H CB1 = L
Load Transient Response
10 to 100 mA Load Step
Vout
2.425
2.500
2.575
V
Vout
2.764
2.850
2.936
V
Vout
2.910
3.000
3.090
V
Vout
3.201
3.300
3.399
V
Vout - 25 - mV
Line Transient Response, Iout = 100 mA
3.0 to 3.6 Vin Line Step
Vout - "5.0 - mVpp
Pulsed Mode Characteristics
Minimum On Time
Output Ripple Voltage, Iout = 100 mA
Feedback Voltage Accuracy, Vout Set = 2.5 V CB0 = L, CB1 = L
Feedback Voltage Accuracy, Vout Set = 2.85 V CB0 = L, CB1 = H
Feedback Voltage Accuracy, Vout Set = 3.0 V CB0 = H, CB1 = H
Feedback Voltage Accuracy, Vout Set = 3.3 V CB0 = H CB1 = L
Ton min
Vout
Vout
Vout
Vout
Vout
-
-
2.425
2.764
2.910
3.201
50
40
2.500
2.850
3.000
3.300
-
-
2.575
2.936
3.090
3.399
nsec
mV
V
V
V
V
http://onsemi.com
5
5 Page 
NCP1512
PACKAGE DIMENSIONS
9 PIN MICRO BUMP
FC SUFFIX
CASE 499E -01
ISSUE O
4X
0.10 C
-A-
D
-B-
E
0.10 C
A
0.05 C
-C-
SEATING
PLANE
A2
A1
D1
e
C
B
A
9X b
0.05 C A B
12
E1
e
3
0.03 C
RECOMMENDED PCB FOOTPRINT
0.5
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. COPLANARITY APPLIES TO SPHERICAL
CROWNS OF SOLDER BALLS.
MILLIMETERS
DIM MIN MAX
A 0.540 0.660
A1 0.210 0.270
A2 0.330 0.390
D 1.450 BSC
E 1.450 BSC
b 0.290 0.340
e 0.500 BSC
D1 1.000 BSC
E1 1.000 BSC
0.250
0.280
0.5
http://onsemi.com
11
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet NCP1512.PDF ] | |
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