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SCV1423 PDF Datasheet - ON Semiconductor

Part Number SCV1423
Description 400 mA Sync-Rect PFM Step-Up DC-DC Converter
Manufacturers ON Semiconductor 
Logo ON Semiconductor Logo 
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SCV1423 datasheet, circuit
NCP1423, SCV1423
400 mA Sync-Rect PFM
Step-Up DC-DC Converter
with True-Cutoff and
Ring-Killer
NCP1423 is a monolithic micropower high frequency step−up
switching converter IC specially designed for battery operated
hand−held electronic products. It integrates Synchronous Rectifier for
improving efficiency as well as eliminating the external Schottky
Diode. High switching frequency (up to 600 kHz) allows low profile
inductor and output capacitor being used. When the IC is disabled,
internal conduction path from LX or BAT to OUT is blocked, OUT pin
is isolated from the battery. This achieves True−Cutoff. Ring−Killer is
also integrated to eliminate the high frequency ringing in discontinuous
conduction mode. Low−Battery Detector, Cycle−by−Cycle Current
Limit, Overvoltage Protection and Thermal Shutdown provide
value−added features for various battery operated application. With all
of these functions ON, the quiescent supply current is only 9.0 mA. This
device is available in compact Micro10 package.
Features
High Efficiency: 92% for 3.3 V Output@ 400 mA from 2.5 V Input
87% for 1.8 V Output@ 70 mA from 1.2 V Input
High Switching Frequency, up to 600 kHz (not hitting current limit)
Low Quiescent Current of 9.0 mA
Low Battery Detector
0.8 V Startup
External Adjustable Output Voltage
±1.5% Output Voltage Accuracy
Ring−Killer for Discontinuous Conduction Mode
Thermal Shutdown
1.2 A Cycle−by−Cycle Current Limit
Output Current up to 400 mA @ VOUT = 3.3 V,
200 mA @ VOUT = 1.8 V
Overvoltage Protection
Low Profile and Minimum External Part
Open Drain Low−Battery Detector Output
Compact Micro10 Package
SCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
These Devices are Pb−Free and are RoHS Compliant
Typical Applications
Wireless Optical Mouse
Wireless Headsets
Internet Audio Players
Personal Digital Assistants (PDAs)
Hand−held Instruments
Conversion from one/two NiMH or NiCd cells to 1.8 V / 3.3 V
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MARKING
DIAGRAM
Micro10
DM SUFFIX
CASE 846B
XXX
AYWG
G
XXX = DAR (NCP1423)
= GEN (SCV1423)
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
EN 1
REF 2
FB 3
GND 4
OUT 5
Micro10
10 LBO
9 LBI
8 ADEN
7 LX
6 BAT
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1423DMR2G Micro10 4000 Tape & Reel
(Pb−Free)
SCV1423DMR2G Micro10 4000 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.
© Semiconductor Components Industries, LLC, 2014
October, 2014 − Rev. 8
1
Publication Order Number:
NCP1423/D

1 page
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SCV1423 pdf, schematic
NCP1423, SCV1423
0.2 mF
ON
OFF
C1
*
R1
R2
22 mF
COUT
100k
EN LBO
REF
FB
LBI
ADEN
ON
OFF
GND
OUT
LX
BAT
NCP1423, SCV1423
5.6 mH
10 mF
CIN
* Optional
Figure 1. Typical Operation Circuit
R3
R4
Low battery
open drain output
Low battery
sense input
PIN DESCRIPTION
Pin No.
Symbol
1 EN
2 REF
3 FB
4 GND
5 OUT
6 BAT
7 LX
8 ADEN
9 LBI
10 LBO
Description
Low−Battery Detector Input and Enable. With this pin pulled down below 0.5 V, the device will be disabled
and will enter shutdown mode
1.195 V Reference Voltage Output, bypass with 0.1 mF capacitor if this pin is not loaded, with a 1.0 mF
bypassing capacitor, this pin can be loaded up to 2.5 mA @ VOUT = 3.3 V.
Output Voltage Feedback Input
Ground
Power Output. OUT provides bootstrap power to the IC
Battery supply input pin and connection for internal Ring−Killer
N−Channel and P−Channel Power MOSFET Drain
Auto Discharge Input
Low−Battery Detector Input
Open−Drain Low−Battery Detector Output. Output is Low when VLBI is < 500 mV.
LBO is high impedance shutdown
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply (Pin 6)
VOUT
−0.3, 6.0
V
Input / Output Pins (Pins 1−3,5,7−10)
VIO
−0.3, 6.0
V
Thermal Characteristics
Micro10 Plastic Package, Case 846B, TA = 25°C
Thermal Resistance Junction−to−Air
PD
RqJA
480 mW
250 °C/W
Operating Junction Temperature Range
TJ
− 40 to + 150
°C
Operating Ambient Temperature Range
TA
− 40 to + 85
°C
Storage Temperature Range
Tstg
− 55 to +150
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
NOTE: ESD data available upon request.
1. This device 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.
2. The maximum package power dissipation limit must not be exceeded.
PD
+
TJ(max) *
RqJA
TA
3. Latchup Current Maximum Rating: ±150 mA per JEDEC standard: JESD78.
4. Moisture Sensitivity Level: MSL 1 per IPC/JEDEC standard: J−STD−020A.
5. Measured on approximately 1 in sq of 1 oz Cu.
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2 Page
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SCV1423 equivalent
NCP1423, SCV1423
TYPICAL OPERATING CHARACTERISTICS
1.27
1.25
1.23
CREF = 0.1 mF
VIN = 1.2 V
VOUT = 3.3 V
TA = 25°C
1.25
1.23
1.21
1.21 1.19
1.19
1.17
1.15
1
10 100
ILOAD, OUTPUT CURRENT (mA)
1000
Figure 3. Reference Voltage vs. Output Current
1.210
1.205
1.200
1.195
1.190
1.185
1.180
−50
VOUT = 3.3 V
CREF = 0.1 mF
IREF = 0 mA
−25 0 25 50 75
TA, AMBIENT TEMPERATURE (°C)
100
Figure 5. Reference Voltage vs. Temperature
1.17
1.15
1.13
1.5
CREF = 0.1 mF
IREF = 0 mA
TA = 25°C
2 2.5 3 3.5 4 4.5 5
VOUT, VOLTAGE AT OUT PIN, (V)
Figure 4. Reference Voltage vs. Voltage at OUT Pin
1.0
VOUT = 3.3 V
0.8
0.6
P−FET (M2)
0.4
N−FET (M1)
0.2
0.0
−40 −20
0
20 40 60 80 100
TA, AMBIENT TEMPERATURE, (°C)
Figure 6. Switch ON Resistance vs. Temperature
0.56
0.54
18
VOUT = 3.3 V
15
0.52 12
0.50 9
0.48 6
0.46
0.44
−50
TA = 25°C
−25 0 25 50 75
TA, AMBIENT TEMPERATURE (°C)
100
Figure 7. Low Battery Detect Voltage vs.
Temperature
3
0−50 −25
0
25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
Figure 8. Operation Current vs. Temperature
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5

5 Page
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SCV1423 diode, scr
NCP1423, SCV1423
TYPICAL OPERATING CHARACTERISTICS
Upper Trace: Output Voltage Ripple, 50 mV/Division
Lower Trace: Battery Voltage, VIN, 1.0 V/Division
(VIN = 1.2 V to 2.0 V; L = 5.6 mH, COUT = 22 mF, ILOAD = 50 mA)
Figure 27. Line Transient Response for VOUT = 3.3 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Lower Trace: Battery Voltage, VIN, 1.0 V/Division
(VIN = 1.0 V to 1.6 V; L = 5.6 mH, COUT = 22mF, ILOAD = 50 mA)
Figure 28. Line Transient Response For VOUT = 1.8 V
Upper Trace: Output Voltage Ripple, 100 mV/Division
Lower Trace: Load Current, ILOAD, 100 mA/Division
(VOUT = 3.3 V, ILOAD = 10 mA to 200 mA; L = 5.6 mH, COUT = 22 mF)
Figure 29. Load Transient Response For VIN = 1.5 V
Upper Trace: Output Voltage Ripple, 100 mV/Division
Lower Trace: Load Current, ILOAD, 100 mA/Division
(VOUT = 1.8 V, ILOAD = 10 mA to 100 mA; L = 5.6 mH, COUT = 22 mF)
Figure 30. Load Transient Response For VIN = 1.0 V
Upper Trace: Output Voltage, 2.0 V/Division
Lower Trace: Output Current, 50 mA/Division
Middle Trace: Enable Pin Waveform, 1.0 V/Division
(VIN = 1.5 V, VOUT = 3.3 V, L = 5.6 mH, CIN = 10 mF, COUT = 22 mF)
Figure 31. Startup Waveform (ADEN Disabled)
Upper Trace: Output Voltage, 2.0 V/Division
Lower Trace: Output Current, 50 mA/Division
Middle Trace: Enable Pin Waveform, 1.0 V/Division
(VIN = 1.5 V, VOUT = 3.3 V, L = 5.6 mH, CIN = 10 mF, COUT = 22 mF)
Figure 32. Startup Waveform (ADEN Enabled)
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Information Total 14 Pages
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