NCP3163, NCV3163
3.4 A, Step-Up/Down/
Inverting 50-300 kHz
Switching Regulator
The NCP3163 Series is a performance enhancement to the popular
MC33163 and MC34163 monolithic DC−DC converters. These
devices consist of an internal temperature compensated reference,
comparator, controlled duty cycle oscillator with an active current
limit circuit, driver and high current output switch. This controller was
specifically designed to be incorporated in step−down, step−up, or
voltage−inverting applications with a minimum number of external
components. The NCP3163 comes in an exposed pad package which
can greatly increase the power dissipation of the built in power switch.
Features
http://onsemi.com
MARKING
DIAGRAMS
16
1
SOIC−16W
EXPOSED PAD
PW SUFFIX
CASE 751AG
16
NCx3163yPW
AWLYYWWG
1
•
•
•
•
•
•
•
•
•
•
•
•
•
Output Switch Current in Excess of 3.0 A
3.4 A Peak Switch Current
Frequency is Adjustable from 50 kHz to 300 kHz
Operation from 2.5 V to 40 V Input
Externally Adjustable Operating Frequency
Precision 2% Reference for Accurate Output Voltage Control
Driver with Bootstrap Capability for Increased Efficiency
Cycle−by−Cycle Current Limiting
Internal Thermal Shutdown Protection
Low Voltage Indicator Output for Direct Microprocessor Interface
Exposed Pad Power Package
Low Standby Current
NCV Prefix for Automotive and Other Applications Requiring Site
and Change Control
•
These are Pb−Free Devices
Current
Limit
18
1
NCx3163y
AWLYYWW
G
G
18
1
18−LEAD DFN
MN SUFFIX
CASE 505
NCx3163y
8
V
in
+
C
in
6
-
+
9
A
WL
YY
WW
G or
G
= Specific Device Code
x = P or V
y = blank or B
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
7
V
CC
Oscillator
R
Q
4
3
Thermal
V
CC
S
10
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
11
5
12
*For additional information on our Pb−Free strategy
and soldering details, please download the
ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
13
14
2
+
+
-
+
+
-
15
1
LVI
16
V
CC
(Bottom View)
C
O
V
out
+
Figure 1. Typical Buck Application Circuit
©
Semiconductor Components Industries, LLC, 2010
April, 2010
−
Rev. 7
1
Publication Order Number:
NCP3163/D
NCP3163, NCV3163
0.25 V
-
+
I
PKsense
R
SC
V
CC
Timing Capacitor
C
T
Shutdown
R
DT
Gnd
Voltage Feedback 1
8
Current
Limit
9
Driver Collector
7
V
CC
6
Oscillator
R
Q
4
3
45 k
2.0 mA
Thermal
S
Latch
Q1
Q2
10
Switch Collector
11
5
12
60
13
14
Switch Emitter
15
V
CC
Voltage Feedback 2
LVI Output
2
+
+
-
1
LVI
Feedback
Comparator
1.25 V 15 k
1.125 V
(Bottom View)
V
CC
+
+
-
7.0 V
16
Bootstrap Input
+
-
= Sink Only
Positive True Logic
Figure 2. Representative Block Diagram
PIN FUNCTION DESCRIPTION
SOIC16
1
2
3
4
6
7
8
9
10,11
14,15
16
5,12,13
Exposed
Pad
DFN18
15
16
17
18
1
3
4
5
6,7,8,9
10,11,12,13
14
2
Exposed
Pad
PIN NAME
LVI Output
Voltage Feedback 2
Voltage Feedback 1
GND
Timing Capacitor
V
CC
I
pk
Sense
Drive Collector
Switch Collector
Switch Emitter
Bootstrap Input
No Connect
Exposed Pad
DESCRIPTION
This pin will sink current when FB1 and FB2 are less than the LVI threshold (V
th
).
Connecting this pin to a resistor divider off of the output will regulate the application
according to the V
out
design equation in Figure 22.
Connecting this pin directly to the output will regulate the device to 5.05 V.
Ground pin for all internal circuits and power switch.
Connect a capacitor to this pin to set the frequency. The addition of a parallel resist-
or will decrease the maximum duty cycle and increase the frequency.
Power pin for the IC.
When (V
CC
−V
IPKsense
) > 250 mV the circuit resets the output driver on a pulse by
pulse basis.
Voltage driver collector
Internal switch transistor collector
Internal switch transistor emitter
Connect this pin to V
CC
for operation at low V
CC
levels. For some topologies, a
series resistor and capacitor can be utilized to improve the converter efficiency.
These pins have no connection.
The exposed pad beneath the package must be connected to GND (pin 4). Addi-
tionally, using proper layout techniques, the exposed pad can greatly enhance the
power dissipation capabilities of the NCP3163.
http://onsemi.com
2
NCP3163, NCV3163
MAXIMUM RATINGS
(Note 1)
Rating
Power Supply Voltage
Switch Collector Voltage Range
Switch Emitter Voltage Range
Switch Collector to Emitter Voltage
Switch Current
Driver Collector Voltage (Pin 8)
Driver Collector Current (Pin 8)
Bootstrap Input Current Range
Current Sense Input Voltage Range
Feedback and Timing Capacitor Input Voltage Range
Low Voltage Indicator Output Voltage Range
Low Voltage Indicator Output Sink Current
Power Dissipation and Thermal Characteristics
Thermal Characteristics
Thermal Resistance, Junction−to−Case
Thermal Resistance, Junction−to−Air
Storage Temperature Range
Maximum Junction Temperature
Operating Ambient Temperature (Note 3)
NCP3163
NCP3163B
NCV3163
R
qJC
R
qJA
T
stg
T
Jmax
T
A
15
56
−65
to +150
+150
0 to +70
−40
to +85
−40
to +125
°C/W
Symbol
V
CC
V
CSW
V
ESW
V
CESW
I
SW
V
CC
I
CC
I
BST
V
IPKSNS
V
in
V
CLVI
I
CLVI
Value
0 to +40
−1.0
to +40
−2.0
to +40
+40
3.4
−1.0
to +40
150
−100
to +100
(V
CC
−
7.0) to (V
CC
+ 1.0)
−1.0
to +7.0
−1.0
to +40
10
Unit
V
V
V
V
A
V
mA
mA
V
V
V
mA
°C
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 200 V.
Charged Device Model 750 V for corner pins and 500 V for others (according to AEC−Q100).
2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.
3. Maximum package power dissipation limits must be observed. Maximum Junction Temperature must not be exceeded.
4. The pins which are not defined may not be loaded by external signals.
PIN CONNECTIONS
1
2
3
4
5
6
7
8
(Top View)
Note: Pin 18 must be tied to EP Flag on PCB
16
15
14
13
12
11
10
9
Driver Collector
Switch Collector
N/C
Switch
Emitter
LVI Output
Voltage Feedback 2
Voltage Feedback 1
GND
N/C
Timing Capacitor
V
CC
I
pk
Sense
Bootstrap Input
Timing Capacitor
N/C
V
CC
I
pk
Sense
Driver Collector
Switch Collector
Switch Collector
Switch Collector
Switch Collector
1
2
3
4
5
6
7
8
9
18
GND
17
16
15
14
13
12
11
10
GND
Voltage Feedback 1
Voltage Feedback 2
LVI Output
Bootstrap Input
Switch Emitter
Switch Emitter
Switch Emitter
Switch Emitter
EP Flag
http://onsemi.com
3
NCP3163, NCV3163
ELECTRICAL CHARACTERISTICS
(V
CC
= 15 V, Pin 16 = V
CC
, C
T
= 270 pF, R
T
= 15 kW, for typical values T
A
= 25°C, for min/max
Characteristic
OSCILLATOR
Frequency
T
A
= 25°C, V
CC
= 15 V
Total Variation over V
CC
= 2.5 V to 40 V and Temperature
Charge Current
Discharge Current
Charge to Discharge Current Ratio
Sawtooth Peak Voltage
Sawtooth Valley Voltage
FEEDBACK COMPARATOR 1
Threshold Voltage
T
A
= 25°C
Total Variation over V
CC
= 2.5 V to 40 V and Temperature
Threshold Voltage
−
Line Regulation (V
CC
= 2.5 V to 40 V, T
A
= 25°C)
Input Bias Current (V
FB1
= 5.05 V)
FEEDBACK COMPARATOR 2
Threshold Voltage
T
A
= 25°C, V
CC
= 15 V
Total Variation over V
CC
= 2.5 V to 40 V and Temperature
Threshold Voltage
−
Line Regulation (V
CC
= 2.5 V to 40 V, T
A
= 25°C)
Input Bias Current (V
FB2
= 1.25 V)
CURRENT LIMIT COMPARATOR
Threshold Voltage
T
A
= 25°C
Total Variation over V
CC
= 2.5 V to 40 V, and Temperature
Input Bias Current (V
Ipk (Sense)
= 15 V)
DRIVER AND OUTPUT SWITCH
(Note 6)
Saturation Voltage (I
SW
= 2.5 A, Pins 14, 15 grounded)
Non−Darlington (R
Pin 9
= 110
W
to V
CC
, I
SW
/I
DRV
≈
20)
Darlington Connection (Pins 9, 10, 11 connected)
Collector Off−State Leakage Current (V
CE
= 40 V)
Bootstrap Input Current Source (V
BS
= V
CC
+ 5.0 V)
Bootstrap Input Zener Clamp Voltage (I
Z
= 25 mA)
LOW VOLTAGE INDICATOR
Input Threshold (V
FB2
Increasing)
Input Hysteresis (V
FB2
Decreasing)
Output Sink Saturation Voltage (I
sink
= 2.0 mA)
Output Off−State Leakage Current (V
OH
= 15 V)
TOTAL DEVICE
Standby Supply Current (V
CC
= 2.5 V to 40 V, Pin 8 = V
CC
,
Pins 6, 14, 15 = GND, remaining pins open)
I
CC
−
6.0
10
mA
V
th
V
H
V
OL(LVI)
I
OH
1.07
−
−
−
1.125
15
0.15
0.01
1.18
−
0.4
5.0
V
mV
V
mA
NCP3163
NCV3163
NCP3163
NCV3163
V
CE(sat)
V
−
−
−
−
−
0.5
V
CC
+ 6.0
0.6
0.6
1.0
1.0
0.02
2.0
V
CC
+ 7.0
1.0
1.5
1.4
1.5
100
4.0
V
CC
+ 9.0
mA
mA
V
V
th(Sense)
mV
−
225
−
250
−
1.0
−
270
20
mA
V
th(FB2)
V
1.225
1.213
−
−
0.4
1.25
−
0.008
−
1.275
1.287
0.03
0.4
%/V
mA
V
th(FB1)
V
4.9
4.85
−
−
5.05
−
0.008
100
5.2
5.25
0.03
200
%/V
mA
NCP3163
NCV3163
f
OSC
kHz
225
212
−
−
8.0
7.0
−
−
250
250
225
25
9.0
9.0
1.25
0.55
275
288
−
−
10.5
10.5
−
−
mA
mA
−
V
V
Symbol
Min
Typ
Max
Unit
values T
A
is the operating ambient temperature range that applies (Note 7), unless otherwise noted.)
I
chg
I
dischg
I
chg
/I
dischg
V
OSC(P)
V
OSC(V)
REGline
(FB1)
I
IB(FB1)
REGline
(FB1)
I
IB(FB2)
I
IB(Sense)
I
C(off)
I
source(DRV)
V
Z
5. Maximum package power dissipation limits must be observed.
6. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
T
high
= + 70°C for NCP3163
7. T
low
= 0°C for NCP3163
=
−
40°C for NCP3163B
= + 85°C for NCP3163B
=
−
40°C for NCV3163
= + 125°C for NCV3163
http://onsemi.com
4
NCP3163, NCV3163
300
V
CC
= 15 V
T
A
= 25°C
250
FREQUENCY (kHz)
200
R
t
= 15 kW
150
R
t
= open
100
50
0
100
200
300
400
500
C
T
, TIMER CAPACITANCE (pF)
600
700
Figure 3. Oscillator Frequency vs. Timer
Capacitance (C
T
)
Δ
f OSC, OSCILLATOR FREQUENCY CHANGE (%)
2.0
V
CC
= 15 V
C
T
= 620 pF
0
Δ
f OSC, OSCILLATOR FREQUENCY CHANGE (%)
4.0
2.0
0
- 2.0
- 4.0
- 6.0
- 8.0
- 10
- 50
- 25
0
25
50
TEMPERATURE (°C)
75
100
125
V
CC
= 15 V
C
T
= 230 pF
R
T
= 20 kW
- 2.0
- 4.0
- 6.0
- 55
- 25
0
25
50
75
T
A
, AMBIENT TEMPERATURE (°C)
100
125
Figure 4. Oscillator Frequency Change vs.
Temperature when only C
T
is connected to Pin 6
Figure 5. Oscillator Frequency Change vs.
Temperature when C
T
and R
T
are connected to Pin 6
140
IIB , INPUT BIAS CURRENT (
μ
A)
V
CC
= 15 V
V
FB1
= 5.05 V
120
V th(FB2) , COMPARATOR 2 THRESHOLD VOLTAGE (mV)
1300
1280
1260
1240
V
th
Min = 1225 mV
1220
1200
- 55
V
CC
= 15 V
V
th
Max = 1275 mV
V
th
Typ = 1250 mV
100
80
60
- 55
- 25
0
25
50
75
T
A
, AMBIENT TEMPERATURE (°C)
100
125
- 25
0
25
50
75
T
A
, AMBIENT TEMPERATURE (°C)
100
125
Figure 6. Feedback Comparator 1 Input Bias
Current vs. Temperature
Figure 7. Feedback Comparator 2 Threshold
Voltage vs. Temperature
http://onsemi.com
5
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
