NCP1509 PDF даташит
Спецификация NCP1509 изготовлена «ON Semiconductor» и имеет функцию, называемую «High Efficiency Synchronous Step-Down DC-DC Converter». |
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Детали детали
Номер произв | NCP1509 |
Описание | High Efficiency Synchronous Step-Down DC-DC Converter |
Производители | ON Semiconductor |
логотип |
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NCP1509
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Up to 500 mA, 1 MHz, High
Efficiency Synchronous
Step-Down DC-DC
Converter in DFN Package
The NCP1509 step−down PWM DC−DC converter is optimized
for portable applications powered from 1−cell Li−ion or 3 cell
Alkaline/NiCd/NiMH batteries. This DC−DC converter utilizes a
current−mode control architecture for easy compensation and better
line regulation. It also uses synchronous rectification to increase
efficiency and reduce external part count. The NCP1509 optimizes
efficiency in light load conditions when switched from a normal
PWM mode to a “pulsed switching” mode. The device also has a
built−in 1 MHz (nominal) oscillator for the PWM circuitry, or it can
be synchronized to an external 500 kHz to 1000 kHz clock signal.
Finally, it includes an integrated soft−start, cycle−by−cycle current
limiting, and thermal shutdown protection. The NCP1509 is
available in a space saving, low profile 3x3 mm 10 pin DFN package.
Features
• High Efficiency:
92.5% for 1.8 V Output at 3.6 V Input and 125 mA Load Current
91% for 1.8 V Output at 3.6 V Input and 300 mA Load Current
• Digital Programmable Output Voltages: 1.05, 1.35, 1.57 or 1.8 V
• Output Current up to 500 mA at Vin = 3.6 V
• Low Quiescent Current of 14 mA in Pulsed Switching Mode
• Low 0.2 mA Shutdown Current
• −30°C to 85°C Operation Temperature
• Low Profile DFN Package
• Pb−Free Package is Available
Application
• Cellular Phones, Smart Phones and PDAs
• Digital Still Cameras
• MP3 Players and Portable Audio Systems
• Wireless and DSL Modems
• Portable Equipment
100
90
80
Vin
2.5 V − 5.2 V
Cin
10uF
5 VCCA
4 VCCP
9 SHD
10 SYNC
LX 3 6.8uH
FB 6
Vout
Cout
22uF
CB1 8 CB0 and CB1
CB0 7 Control Input
70
60
50
40
30
20
GNDA GNDP
12
10
0
0.001
Figure 1. Typical Application Circuit
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MARKING
DIAGRAM
1
10 PIN DFN
1509
MN SUFFIX
ALYW
1 CASE 485C
1509 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
ORDERING INFORMATION
Device
Package
Shipping†
NCP1509MNR2 10 Pin DFN 3000 Tape & Reel
NCP1509MNR2G 10 Pin DFN 3000 Tape & Reel
(Pb−Free)
†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.
Pulsed Mode
PWM Mode
Vin = 3.6 V
Vout = 1.8 V
0.01
0.1 1
Iout (mA)
10
100 1000
Figure 2. Efficiency vs. Output Current
Semiconductor Components Industries, LLC, 2004
September, 2004 − Rev. 0
1
Publication Order Number:
NCP1509/D
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COMPENSATION
RAMP
6
FB
GNDA 1
CB0 7
CB1 8
SELECT
LOGIC
NCP1509
ISENS
SENFET
w5 ww.DataSheet4U.com
4
VCCA
VCCP
-
- CMP
OA +
+
-
CMP
+
PWM
OVP
PM
ILIM +
CMP
-
-
CMP
+
CONTROL
BLOCK
(PWM,PM)
ISENS
DVR
Q1
3 LX
DAMPING
SWITCHING
CONTROL
ZCL -
CMP
+
6
FB
DVR
Q2
SHD 9
BANDGAP
REFERENCE
AND SOFT
START
ENABLE
DETECT
THERMAL
SHUTDOWN
MODE SELECTION
SYNC DETECT
AND
TIMING BLOCK
2
GNDP
10
SYNC
Figure 3. Simplified Block Diagram
PIN FUNCTION DESCRIPTION
Pin
Number
Name
Type
1
GNDA
Analog GND
2
GNDP
Power GND
3 LX Power Output
4
VCCP
Power Input
5
VCCA
Power Input
6 FB Analog Input
7 CB0 Analog Input
8 CB1 Analog Input
9
SHD
Analog Input
10
SYNC
Analog Input
Description
Ground connection for the Analog Section of the IC. This is the GND for the FB, SYNC,
CB0, CB1, PG and ENABLE pins.
Ground connection for the N−FET Power Stage.
Connection from Power MOSFETs to the Inductor.
Power Supply Input for the Switching P−FET.
Power Supply Input for the Analog Section of the IC.
Feedback voltage from the output of the power supply.
Vout Selection Pin. This pin contains a pulldown resistor.
Vout Selection Pin. This pin contains a pullup resistor.
Enable for Switching Regulator. This pin is active high to turn on the NCP1509. This pin
contains an internal pulldown resistor.
Synchronization input for the PWM converter. If a clock signal is present, the converter
uses the rising edge for the turn on of the PFET. If this pin is low, the converter is in Low Iq
Pulse mode. If this pin is high, the converter uses the internal oscillator for the PWM mode.
This pin has an internal pulldown resistor to force the operation into the Pulse mode.
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NCP1509
MAXIMUM RATINGS
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Rating
Symbol
Value
Unit
Maximum Voltage All Pins
Maximum Operating Voltage All Pins
Thermal Resistance, Junction−to−Air
Operating Ambient Temperature Range
ESD Withstand Voltage
Human Body Model (Note 1)
Machine Model (Note 1)
Vmax
Vmax
RqJA
TA
VESD
5.5
5.2
68.5
−30 to 85
> 2500
> 150
V
V
°C/W
°C
V
Moisture Sensitivity
MSL
Level 1
Storage Temperature Range
Tstg
−55 to 150
°C
Junction Operating Temperature
TJ
−30 to 125
°C
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.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model, 100 pF discharge through a 1.5 kW following specification JESD22/A114.
Machine Model, 200 pF discharged through all pins following specification JESD22/A115.
Latchup as per JESD78 Class II: > 100 mA.
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