ON Semiconductor NCP3163, NCV3163 Technical data

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

•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 Control Changes

•These are Pb−Free Devices

				Current
		8	−	Limit	9
			+
Vin		7			10
	+
			VCC
Cin
		6	Oscillator		11
		5		R	12
				Q
		4	Thermal	S	13
				VCC
		3			14
		2		+	15
				+
				−
		1	+		16
			+
			−
			LVI	VCC	Vout
				(Bottom View)	+
					CO

Figure 1. Typical Buck Application Circuit

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				MARKING
				DIAGRAMS
	16		16
	1			NCx3163yPW
	SOIC−16W
				AWLYYWWG
	EXPOSED PAD
	PW SUFFIX		1
	CASE 751AG
	18		1	18
	18−LEAD DFN			NCP3163y
				AWLYYWW G
	1	MN SUFFIX
		CASE 505		G
	NCx3163x	=	Specific Device Code
			x = P or V
			y = blank or B
	A	=	Assembly Location
	WL	=	Wafer Lot
	YY	=	Year
	WW	=	Work Week
	G or G	= Pb−Free Package

(Note: Microdot may be in either location)

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 18 of this data sheet.

*For additional information on our Pb−Free strategy and soldering details, please download the

ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.

♥ Semiconductor Components Industries, LLC, 2007	1	Publication Order Number:
January, 2007 − Rev. 4		NCP3163/D

				NCP3163, NCV3163
IPKsense		0.25 V			Current
	8			−	Limit			9	Driver Collector
RSC				+
VCC	7							10
		VCC							Switch Collector
Timing Capacitor
	6						Q1	11
			Oscillator
CT							Q2
Shutdown						R
RDT	5							12
						Q	60
	4		Thermal			S		13
Gnd						Latch
						VCC
Voltage Feedback 1	3							14
				45 k		2.0 mA			Switch Emitter
Voltage Feedback 2	2				+	Feedback		15
					+
						Comparator
					−
LVI Output	1		+		1.25 V 15 k		7.0 V	16
			+						Bootstrap Input
			−	1.125 V
		LVI
						VCC
									+

(Bottom View)					= Sink Only
		−			Positive True Logic
Figure 2. Representative Block Diagram

PIN FUNCTION DESCRIPTION

SOIC16	DFN18	PIN NAME	DESCRIPTION
1	15	LVI Output	This pin will sink current when FB1 and FB2 are less than the LVI threshold (Vth).
2	16	Voltage Feedback 2	Connecting this pin to a resistor divider off of the output will regulate the application
			according to the Vout design equation in Figure 22.
3	17	Voltage Feedback 1	Connecting this pin directly to the output will regulate the device to 5.05 V.
4	18	GND	Ground pin for all internal circuits and power switch.
6	1	Timing Capacitor	Connect a capacitor to this pin to set the frequency. The addition of a parallel resis-
			tor will decrease the maximum duty cycle and increase the frequency.
7	3	VCC	Power pin for the IC.
8	4	Ipk Sense	When (VCC−VIPKsense) > 250 mV the circuit resets the output driver on a pulse by
			pulse basis.
9	5	Drive Collector	Voltage driver collector
10,11	6,7,8,9	Switch Collector	Internal switch transistor collector
14,15	10,11,12,13	Switch Emitter	Internal switch transistor emitter
16	14	Bootstrap Input	Connect this pin to VCC for operation at low VCC levels. For some topologies, a
			series resistor and capacitor can be utilized to improve the converter efficiency.
5,12,13	2	No Connect	These pins have no connection.
Exposed	Exposed	Exposed Pad	The exposed pad beneath the package must be connected to GND (pin 4). Addi-
Pad	Pad		tionally, using proper layout techniques, the exposed pad can greatly enhance the
			power dissipation capabilities of the NCP3163.

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NCP3163, NCV3163

MAXIMUM RATINGS (Note 1)

Rating	Symbol	Value	Unit
Power Supply Voltage	VCC	0 to +40	V
Switch Collector Voltage Range	VCSW	−1.0 to +40	V
Switch Emitter Voltage Range	VESW	−2.0 to +40	V
Switch Collector to Emitter Voltage	VCESW	+40	V
Switch Current	ISW	3.4	A
Driver Collector Voltage (Pin 8)	VCC	−1.0 to +40	V
Driver Collector Current (Pin 8)	ICC	150	mA
Bootstrap Input Current Range	IBST	−100 to +100	mA
Current Sense Input Voltage Range	VIPKSNS	(VCC − 7.0) to (VCC + 1.0)	V
Feedback and Timing Capacitor Input Voltage Range	Vin	−1.0 to +7.0	V
Low Voltage Indicator Output Voltage Range	VCLVI	−1.0 to +40	V
Low Voltage Indicator Output Sink Current	ICLVI	10	mA
Power Dissipation and Thermal Characteristics
Thermal Characteristics			°C/W
Thermal Resistance, Junction−to−Case	RqJC	15
Thermal Resistance, Junction−to−Air	RqJA	56
Storage Temperature Range	Tstg	−65 to +150	°C
Maximum Junction Temperature	TJmax	+150	°C
Operating Ambient Temperature (Note 3)	TA		°C
NCP3163PW		0 to +70
NCP3163BPW		−40 to +85
NCV3163PW		−40 to +125

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 1500 V per MIL−STD−883, Method 3015.

Machine Model Method 150 V.

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	16	Bootstrap Input
	LVI Output
	2	15		Timing Capacitor	1		18
	Voltage Feedback 2		Switch	N/C	2	GND	17
	3	14
			Emitter
	Voltage Feedback 1			VCC	3		16
		13
	4			Ipk Sense	4		15
	GND	12	N/C
	5			Driver Collector	5		14
	N/C
		11		Switch Collector	6		13
	6
	Timing Capacitor	10		Switch Collector	7		12
	7		Switch Collector
						EP Flag
	VCC	9		Switch Collector	8		11
	8			Switch Collector	9		10
	Ipk Sense		Driver Collector
		(Top View)

GND

Voltage Feedback 1

Voltage Feedback 2

LVI Output

Bootstrap Input

Switch Emitter

Switch Emitter

Switch Emitter

Switch Emitter

Note: Pin 18 must be tied to EP Flag on PCB

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NCP3163, NCV3163

ELECTRICAL CHARACTERISTICS (VCC = 15 V, Pin 16 = VCC, CT = 270 pF, RT = 15 kW, for typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies (Note 7), unless otherwise noted.)

Characteristic	Symbol	Min	Typ	Max	Unit
OSCILLATOR
Frequency	fOSC				kHz
TA = 25°C, VCC = 15 V		225	250	275
Total Variation over VCC = 2.5 V to 40 V and Temperature		212	250	288
Charge Current	Ichg	−	225	−	mA
Discharge Current	Idischg	−	25	−	mA
Charge to Discharge Current Ratio	Ichg/Idischg	8.0	9.0	10.5	−
Sawtooth Peak Voltage	VOSC(P)	−	1.25	−	V
Sawtooth Valley Voltage	VOSC(V)	−	0.55	−	V
FEEDBACK COMPARATOR 1
Threshold Voltage	Vth(FB1)				V
TA = 25°C		4.9	5.05	5.2
Total Variation over VCC = 2.5 V to 40 V and Temperature		4.85	−	5.25
Threshold Voltage	REGline(FB1)				%/V
Line Regulation (VCC = 2.5 V to 40 V, TA = 25°C)		−	0.008	0.03
Input Bias Current (VFB1 = 5.05 V)	IIB(FB1)	−	100	200	mA
FEEDBACK COMPARATOR 2
Threshold Voltage	Vth(FB2)				V
TA = 25°C, VCC = 15 V		1.225	1.25	1.275
Total Variation over VCC = 2.5 V to 40 V and Temperature		1.213	−	1.287
Threshold Voltage	REGline(FB1)				%/V
Line Regulation (VCC = 2.5 V to 40 V, TA = 25°C)		−	0.008	0.03
Input Bias Current (VFB2 = 1.25 V)	IIB(FB2)	− 0.4	−	0.4	mA
CURRENT LIMIT COMPARATOR
Threshold Voltage	Vth(Sense)				mV
TA = 25°C		−	250	−
Total Variation over VCC = 2.5 V to 40 V, and Temperature		225	−	270
Input Bias Current (VIpk (Sense) = 15 V)	IIB(Sense)	−	1.0	20	mA
DRIVER AND OUTPUT SWITCH (Note 6)
Saturation Voltage (ISW = 2.5 A, Pins 14, 15 grounded)	VCE(sat)				V
NCP3163 − Non−Darlington (RPin 9 = 110 W to VCC, ISW/IDRV ≈ 20)		−	0.6	1.0
NCV3163 − Non−Darlington (RPin 9 = 110 W to VCC, ISW/IDRV ≈ 20)		−	0.6	1.2
Darlington Connection (Pins 9, 10, 11 connected)		−	1.0	1.4
Collector Off−State Leakage Current (VCE = 40 V)	IC(off)	−	0.02	100	mA
Bootstrap Input Current Source (VBS = VCC + 5.0 V)	Isource(DRV)	0.5	2.0	4.0	mA
Bootstrap Input Zener Clamp Voltage (IZ = 25 mA)	VZ	VCC + 6.0	VCC + 7.0	VCC + 9.0	V
LOW VOLTAGE INDICATOR
Input Threshold (VFB2 Increasing)	Vth	1.07	1.125	1.18	V
Input Hysteresis (VFB2 Decreasing)	VH	−	15	−	mV
Output Sink Saturation Voltage (Isink = 2.0 mA)	VOL(LVI)	−	0.15	0.4	V
Output Off−State Leakage Current (VOH = 15 V)	IOH	−	0.01	5.0	mA
TOTAL DEVICE
Standby Supply Current (VCC = 2.5 V to 40 V, Pin 8 = VCC,	ICC	−	6.0	10	mA
Pins 6, 14, 15 = GND, remaining pins open)

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.

7. Tlow =	0°C for NCP3163	Thigh =	+ 70°C for NCP3163
=	− 40°C for NCP3163B	=	+ 85°C for NCP3163B
=	− 40°C for NCV3163	=	+ 125°C for NCV3163

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NCP3163, NCV3163

f OSC, OSCILLATOR FREQUENCY CHANGE (%)

2.0

0

− 2.0

− 4.0

− 6.0 − 55

	300
													VCC = 15 V
													TA = 25°C
(kHz)	250
	200
FREQUENCY											Rt = 15 kW
	150
							Rt = open
	100
	50
	0		100		200		300		400		500		600			700

CT, TIMER CAPACITANCE (pF)

Figure 3. Oscillator Frequency vs. Timer

Capacitance (CT)

															(%)	4.0
											VCC = 15 V				CHANGE								VCC = 15 V
											CT = 620 pF					2.0							CT = 230 pF
															FREQUENCY	0							RT = 20 kW
																− 4.0
															OSCILLATOR,	− 2.0
																− 6.0
																− 8.0
															OSC	− 10
− 25		0		25		50		75			100		125			− 50		− 25	0	25	50	75	100	125
		TA, AMBIENT TEMPERATURE (°C)													f					TEMPERATURE (°C)

Figure 4. Oscillator Frequency Change vs. Temperature when only CT is connected to Pin 6

Figure 5. Oscillator Frequency Change vs. Temperature when CT and RT are connected to Pin 6

IIB, INPUT BIAS CURRENT (A)μ

140

VCC = 15 V VFB1 = 5.05 V

120

100

80

60
− 55	− 25	0	25	50	75	100	125

TA, AMBIENT TEMPERATURE (°C)

Figure 6. Feedback Comparator 1 Input Bias

Current vs. Temperature

Vth(FB2), COMPARATOR 2 THRESHOLD VOLTAGE (mV)

1300
1280		VCC = 15 V						Vth Max = 1275 mV
1260
								Vth Typ = 1250 mV
1240
1220									Vth Min = 1225 mV
1200
− 55		− 25		0		25		50			75		100			125

TA, AMBIENT TEMPERATURE (°C)

Figure 7. Feedback Comparator 2 Threshold

Voltage vs. Temperature

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NCP3163, NCV3163

I source (DRV), BOOTSTRAP INPUT CURRENT SOURCE (mA

2.8

VCC = 15 V

Pin 16 = VCC + 5.0 V

2.4

2.0

1.6

1.2
− 55	− 25	0	25	50	75	100	125

TA, AMBIENT TEMPERATURE (°C)

Figure 8. Bootstrap Input Current

Source vs. Temperature

VZ, BOOTSTRAP INPUT ZENER CLAMP VOLTAGE (V

7.6

IZ = 25 mA

7.4

7.2

7.0

6.8
− 55	− 25	0	25	50	75	100	125

TA, AMBIENT TEMPERATURE (°C)

Figure 9. Bootstrap Input Zener Clamp

Voltage vs. Temperature

		0
	(V)		VCC	Darlington Configuration
				Emitter Sourcing Current to GND
	SATURATION	− 0.4
				Pins 7, 8, 10, 11 = VCC
				Pins 4, 5, 12, 13 = GND
		− 0.8		TA = 25°C, (Note 2)
	SOURCE,
		−1.2	Bootstrapped, Pin 16 = VCC + 5.0 V
	(sat)	−1.6
	CE		Non−Bootstrapped, Pin 16 = VCC
	V

− 2.0

0

0.8

1.6

2.4

3.2

IE, EMITTER CURRENT (A)

Figure 10. Output Switch Source Saturation

vs. Emitter Current

	1.2
(V)	1.0	Darlington, Pins 9, 10, 11 Connected
SATURATION
	0.8
		Grounded Emitter Configuration
	0.6	Collector Sinking Current From VCC
,SINK
		Pins 7, 8 = VCC = 15 V
	0.4	Pins 4, 5, 12, 13, 14, 15 = GND
CE (sat)		TA = 25°C, (Note 2)
	0.2		Saturated Switch, RPin9 = 110 W to VCC
V
	0		GND
	0	0.8	1.6	2.4	3.2

IC, COLLECTOR CURRENT (A)

Figure 11. Output Switch Sink Saturation

vs. Collector Current

VE, EMITTER VOLTAGE (V)

0

GND

IC = 10 mA

− 0.4

− 0.8

IC = 10 mA

− 1.2

VCC = 15 V

− 1.6 Pins 7, 8, 9, 10, 16 = VCC Pins 4, 6 = GND

Pin 14 Driven Negative

− 2.0
− 55	− 25	0	25	50	75	100	125

TA, AMBIENT TEMPERATURE (°C)

Figure 12. Output Switch Negative Emitter

Voltage vs. Temperature

	(V)	0.5	VCC = 5 V
	VOLTAGE
			TA = 25°C
		0.4
	SATURATION	0.3
		0.2
	, OUTPUT	0.1
	(LVI)	0
	OL
		0	2.0	4.0	6.0	8.0
	V

Isink, OUTPUT SINK CURRENT (mA)

Figure 13. Low Voltage Indicator Output Sink Saturation Voltage vs. Sink Current

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