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NCP630 3.0 A Fast Linear Voltage Regulators
The NCP630 is a low dropout positive voltage regulator that is capable of providing a guaranteed output current of 3.0 A with a maximum dropout voltage of 1.25 V at 3.0 A over temperature. The fast turn on time allows step changes in loads commonly found in low voltage microprocessor applications. The NCP630 is currently offered as an adjustable output version that can be programmed down to 1.2 V with two external resistors and as a fixed output version at 3.47 V. On chip trimming adjusts the reference/output voltage to within "1.5% accuracy. Internal protection features consist of output current limiting and thermal shutdown. NCP630 is available in D2PAK package.
Features
1 5 NCP630A Tab = Ground Pin 1. Shutdown 2. Vin 3. Ground 4. Vout 5. Adj x A WL Y WW G NCP630G Tab = Ground Pin 1. Shutdown 2. Vin 3. Ground 4. Vout 5. Sense
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D2PAK D2T SUFFIX CASE 936A
NC P630xD2T AWLYWWG
* * * * * * * * * * * *
Output Current of 3.0 A 1.25 V Maximum Dropout Voltage at 3.0 A Over Temperature Voltage on Shutdown Pin is TTL Compatible Reference/Output Voltage Trimmed to "1.5% Current Limit Protection Thermal Shutdown Protection -40C to 125C Junction Temperature Range Pb-Free Packages are Available
Applications
Microprocessor Power Supplies DSP Power Supplies SMPS Post Regulation Battery Chargers
= Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet.
INPUT Cin 68 mF - + Shutdown
Vin
Vout R2 +
Vout @3A
INPUT Cin 68 mF - + Shutdown
Vin
Vout +
Vout @3A
NCP630A ADJ GND
Co 33 mF
NCP630G SENSE GND
Co 33 mF
R1 10 kW
R2 + R1
Vout *1 1.216
Figure 1. Typical Application Circuit for NCP630A
Figure 2. Typical Application Circuit for NCP630G
(c) Semiconductor Components Industries, LLC, 2005
1
June, 2005 - Rev. 5
Publication Order Number: NCP630/D
NCP630
MAXIMUM RATINGS
Rating Input Voltage (Note 1) Shutdown Voltage Output Voltage Output Short Circuit Duration (Note 2) Power Dissipation and Thermal Characteristics Case 936F (D2PAK) Power Dissipation (Note 2) Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature @ 260C Symbol Vin Shutdown Vout - Value 12 -0.3 to Vin + 0.3 -0.3 to Vin + 0.3 Infinite Unit V V V -
PD RqJA RqJC TJ Tstg Tsolder
Internally Limited 45 5.0 -40 to 125 -55 to 150 10
W C/W C/W C C sec
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 JESD 22-A114-B Machine Model JESD 22-A115-A 2. The maximum package power dissipation is: *T T J(max) A P+ D R
qJA
PIN FUNCTION DESCRIPTION
Pin No. 1 NCP630A Shutdown NCP630G Shutdown Description This input is used to place the NCP630 into shutdown mode. The NCP630 is active when a voltage greater than 2.0 V is applied. The NCP630 will be placed into a shutdown mode when a voltage less than 0.8 V is applied. If left unused then connect the pin high. Positive power supply input voltage Power supply ground Regulated output voltage This pin is to be Connected to the Rsense resistors on the output. It maintains 1.216 V between itself and ground. Refer to Figure 1 for equation. This pin is to be connected near the load for better regulation.
2 3, Tab 4 5 5
Vin Ground Vout Adj -
Vin Ground Vout - Sense
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NCP630
ELECTRICAL CHARACTERISTICS (Cin = 68 mF, Cout = 33 mF, Vin = Vout + 1.5 V, Iout = 10 mA, for typical value TJ = 25C, for min
and max values TJ = -40C to 125C unless otherwise noted.) Characteristic NCP630A Reference Voltage (Vin = Vout + 1.5 V to 7.0 V, Iout = 10 mA to 3.0 A, TJ = 25C) (Vin = Vout + 1.5 V to 7.0 V, Iout = 10 mA to 3.0 A, TJ = -40C to 125C) Line Regulation (Notes 3 and 4) (Vin = Vout + 1.5 V to 7.0 V, TJ = 25C) (Vin = Vout + 1.5 V to 7.0 V, TJ = -40C to 125C) Load Regulation (Notes 3 and 4) (Iout = 10 mA to 3.0 A, TJ = 25C) (Iout = 10 mA to 3.0 A, TJ = -40C to 125C) Dropout Voltage (Measured at Vout - 2%) (Iout = 300 mA) (Iout = 3.0 A) Ground Pin Current in Normal Mode (Iout = 300 mA) (Iout = 3.0 A) Ground Pin Current in Shutdown Mode (Vshutdown = 0.8 V) Peak Output Limit Short Current Limit (Note 5) Thermal Shutdown Shutdown Input Threshold Voltage (Voltage Increasing, Output Turns On, Logic High) (Voltage Decreasing, Output Turns Off, Logic Low) Turn-off Delay, Iout = 3.0 A Turn-on Delay, Iout = 3.0 A Shutdown Input Low Current (VShutdown = 0.8 V), (Negative current flows out of pin) Shutdown Input High Current (VShutdown = 2.0 V), (Negative current flows out of pin) Ripple Rejection (Cout = 100 mF, f = 1.0 kHz) Output Noise Density (f = 120 Hz) Output Noise Voltage (f = 20 Hz - 100 kHz) Vadj 1.198 1.180 Regline - - Regload - - Vin-Vout - - IGnd - - IGnd - Iout ISC - Vtth(shutdown) 2.0 - TD(off) TD(on) IIL IIH RR - - Vn - 210 - - 85 0.6 - - mV Hz - - -10 -10 - - 20 25 -5.0 -4.5 - 0.8 - - -1.0 -1.0 ms ms mA mA dB 3.0 - - 15 6.0 6.5 165 50 - - - A A C V 0.4 1.0 1.0 2.0 mA 0.75 1.0 1.0 1.25 mA 0.01 0.06 - - V 0.02 0.06 - - % 1.216 - 1.234 1.253 % V Symbol Min Typ Max Unit
mVrms
3. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 4. Line regulation is defined as the change in output voltage for a change in input voltage. Load regulation is defined as the change in output voltage for a change in output load current at a constant temperature. The limits for line and load regulation are contained within the reference voltage specification, Vadj. Typical numbers are included in the specification for line and load regulation. 5. The short circuit limit is for device protection. Maximum output current is guaranteed to be greater or equal to 3.0 A with a 6.0 A typical as listed in the peak output limit specification.
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NCP630
ELECTRICAL CHARACTERISTICS (Cin = 68 mF, Cout = 33 mF, Vin = Vout + 1.5 V, Iout = 10 mA, for typical value TJ = 25C, for min
and max values TJ = 0C to 125C unless otherwise noted.) Characteristic NCP630G Output Voltage (Vin = 5.0 V to 7.0 V, Iout = 10 mA to 3.0 A, TJ = 25C) (Vin = 5.0 V to 7.0 V, Iout = 10 mA to 3.0 A, TJ = 0C to 125C) Line Regulation (Notes 6 and 7) (Vin = 5.0 V to 7.0 V, TJ = 25C) (Vin = 5.0 V to 7.0 V, TJ = 0C to 125C) Load Regulation (Notes 6 and 7) (Iout = 10 mA to 3.0 A, TJ = 25C) (Iout = 10 mA to 3.0 A, TJ = 0C to 125C) Dropout Voltage (Measured at Vout - 2%) (Iout = 300 mA) (Iout = 3.0 A) Ground Pin Current in Normal Mode (Iout = 300 mA) (Iout = 3.0 A) Ground Pin Current in Shutdown Mode (Vshutdown = 0.8 V) Peak Output Limit Short Current Limit (Note 8) Thermal Shutdown Shutdown Input Threshold Voltage (Voltage Increasing, Output Turns On, Logic High) (Voltage Decreasing, Output Turns Off, Logic Low) Turn-off Delay, Iout = 3.0 A Turn-on Delay, Iout = 3.0 A Shutdown Input Low Current (Vin = 0.8 V), (Negative current flows out of pin) Shutdown Input High Current (Vin = 2.0 V), (Negative current flows out of pin) Ripple Rejection (Cout = 100 mF, f = 1.0 kHz) Output Noise Density (f = 120 Hz) Output Noise Voltage (f = 10 Hz - 100 kHz) Vout 3.418 3.383 Regline - - Regload - - Vin-Vout - - IGnd - - IGnd - Iout ISC - Vtth(shutdown) 2.0 - TD(off) TD(on) IIL IIH RR - - Vn - 210 - - 85 0.6 - - mV Hz - - -10 -10 - - 20 25 -5.0 -4.5 - 0.8 - - -1.0 -1.0 ms ms mA mA dB 3.0 - - 26 5.0 5.0 165 50 - - - A A C V 0.4 1.0 1.0 2.0 mA 0.75 1.0 1.0 1.25 mA 0.01 0.06 - - V 0.02 0.06 - - % 3.470 - 3.522 3.557 % V Symbol Min Typ Max Unit
mVrms
6. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 7. Line regulation is defined as the change in output voltage for a change in input voltage. Load regulation is defined as the change in output voltage for a change in output load current at a constant temperature. The limits for line and load regulation are contained within the output voltage specification, Vout. Typical numbers are included in the specification for line and load regulation. 8. The short circuit limit is for device protection. Maximum output current is guaranteed to be greater or equal to 3.0 A with a 5.0 A typical as listed in the peak output limit specification.
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NCP630
TYPICAL CHARACTERISTICS
3.480 VOUT, OUTPUT VOLTAGE (V) 3.475 3.470 3.465 3.460 3.455 3.450 -40
ISC, SHORT CIRCUIT CURRENT LIMIT (A)
9 8 7 6 5 4 3 2 1 0 -40 -20 0 20 40 60 80 100 120
-20
0
20
40
60
80
100
120
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 3. Output Voltage versus Temperature
1.2 IGND, GROUND CURRENT (mA) 1 0.8 IOUT = 300 mA 0.6 0.4 0.2 0 -40 IOUT = 3.0 A 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -40
Figure 4. Short Circuit Current Limit versus Temperature
VIN = VOUT + 1.5 V VSD = VIN
VIN - VOUT, DROPOUT VOLTAGE (V)
IOUT = 3.0 A
IOUT = 300 mA
-20
0
20
40
60
80
100
120
-20
0
20
40
60
80
100
120
TA, TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 5. Dropout Voltage versus Temperature
Figure 6. Ground Current versus Temperature
40 VOUT, OUTPUT VOLTAGE (V) IGND, GROUND CURRENT (mA) 35 30 25 20 SHUTDOWN VOLTAGE (V) 15 10 5 0 -60 -40 -20 0 20 40 60 80 100 120 140 VIN = VOUT + 1.5 V VSD = 0 V
4 3 2 1 0
COUT = 100 mF RL = 3.5 W
3 2 1 0 0 20 40 60 TIME (ms) 80 100 120
TA, AMBIENT TEMPERATURE (C)
Figure 7. Ground Pin Current in Shutdown Mode versus Temperature
Figure 8. Start-up Transient
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NCP630
TYPICAL CHARACTERISTICS
1.2 VN, NOISE VOLTAGE (mV/ Hz) RIPPLE REJECTION (dB) 1 0.8 0.6 0.4 0.2 0 0.01 0.1 1 f, FREQUENCY (kHz) 10 100 VIN = VOUT + 1.0 V COUT - 33 mF Tantalum CIN = 100 mF IOUT = 10 mA 120 100 80 60 40 20 0 0.01 0.1 1 f, FREQUENCY (kHz) 10 100 VOUT = 3.47 V VIN = 5.0 V + 0.5 VPP COUT = 100 mF Electrolytic IOUT = 10 mA
Figure 9. Output Noise Density
Figure 10. Ripple Rejection
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NCP630
APPLICATION INFORMATION
Input Capacitor Reverse Current
The minimum capacitance required for stability is a 68 mF aluminum electrolytic or tantalum capacitor. The maximum ESR allowed for stability is 5.0 W. The capacitor should be place as close as possible to the input of the device. The placement of a ceramic capacitor in parallel is not recommend due to possible instabilities.
Output Capacitor
Some situations might occur were the output pin is raised to a voltage while the input pin is at zero volts. This situation will not damage the device. If the output voltage is raised to a higher voltage than the input voltage a diode is recommended from output to input with the anode connect to the output pin.
Thermal Considerations
A minimum output capacitor value of 33 mF is required for stability. The type of capacitor can be aluminum electrolytic or tantalum capacitor. ESR can vary up to a maximum of 2.0 ohms for stability. The capacitor should be placed as close as possible to the output of the device. The placement of a ceramic capacitor in parallel is not recommend due to possible instabilities.
Sense Pin
The sense pin of the NCP630G will need to be connected near the output voltage. This provides great advantages when the linear regulator can't be near the load. The sense pin will monitor the load and allow the linear regulator to adjust for losses in the line between itself and the load. Thus it will provide good accuracy for a remote load.
ADJ Pin
This series contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature is exceeded. When activated, typically at 165C, the regulator output switches off and then back on as the die cools. As a result, if the device is continuously operated in an overheated condition, the output will appear to be oscillating. This feature provides protection from a catastrophic device failure due to accidental overheating. It is not intended to be used as a substitute for proper heatsinking. The maximum device power dissipation can be calculated by:
PD + TJ(max) * TA RqJA
The typical application circuits for the fixed and adjustable output regulators are shown in Figures 1 and 2. The adjustable devices develop and maintain the nominal 1.216 V reference voltage between the adjust and ground pins. The adjust pin current, Iadj, is typically 40 nA and normally lower than the current flowing through R1 and R2, thus it generates a small output voltage error that can usually be ignored. For the fixed output devices R1 and R2 are included within the device.
The devices are available in surface mount D2PAK package. The package has an exposed metal tab that is specifically designed to reduce the junction to air thermal resistance, RqJA, by utilizing the printed circuit board copper as a heat dissipater. Figure 11 shows typical RqJA values that can be obtained from a square pattern using economical single sided 2.0 ounce copper board material. The final product thermal limits should be tested and quantified in order to insure acceptable performance and reliability. The actual RqJA can vary considerably from the graphs shown. This will be due to any changes made in the copper aspect ratio of the final layout, adjacent heat sources, and air flow.
PD, MAXIMUM POWER DISSIPATION (W) 3.5 PD(max) for TA = 50C 3.0 2.0 oz. Copper L 2.5 2.0 1.5 1.0
80 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR ( C/W) 70 60 50 40 RqJA 30 0 5.0 10 15 20
Free Air Mounted Vertically Minimum Size Pad
L
L, LENGTH OF COPPER (mm)
Figure 11. 3-Pin and 5-Pin D2PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
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IIII IIII IIII IIII
25 30
NCP630
TAPE AND REEL SPECIFICATION
SOP Description D2PAK Leads 5 Package Length 9.2 mm Package Width 10 mm Package Thickness 4.4 mm Reel Quantity 800 Tape Pitch 16 mm Tape Width 24 mm Vendor P/N DDPAK-B
2.0 0.1 0.30 $ 0.05 R 0.3 MAX 4.0 0.1 See Note #2
1.55 0.05 1.50 MIN B
1.75 0.1
0.70 Max 20 Max 2.40 Max 9.00 11.15 A 4.70 K0 SECTION B-B A0 16.00 A0 = 10.60 0.15 B0 = 16.50 0.15 K0 = 4.90 0.15 B A
11.5 0.1 B0 24.0 0.3
ALL DIMENSIONS IN MILLIMETERS 0.30 $ 0.05 SECTION A-A 1.00
NOTES: 1. A0 & B0 MEASURED AT 0.3 mm ABOVE BASE OF POCKET 2. 10 PITCHES CUMULATIVE TOTAL 0.2 mm
Figure 12. Package Carrier Dimensions
Nominal Hub Depth 4 mm 8 mm 16 mm 28 mm
W1 +3
-2
W2MAX 7.1 11.1 19.1 31.1
4.4 8.4 16.4 28.4
Figure 13. Reel Dimensions http://onsemi.com
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NCP630
ORDERING INFORMATION
Device NCP630AD2T NCP630AD2TG NCP630AD2TR4 NCP630AD2TR4G NCP630GD2T NCP630GD2TG NCP630GD2TR4 NCP630GD2TR4G Nominal Output Voltage Adj Adj Adj Adj 3.47 3.47 3.47 3.47 Package D2PAK D2PAK (Pb-Free) D2PAK D2PAK (Pb-Free) D2PAK D2PAK (Pb-Free) D2PAK D2PAK (Pb-Free) Shipping 50 Units/Rail 50 Units/Rail 800/Tape & Reel 800/Tape & Reel 50 Units/Rail 50 Units/Rail 800/Tape & Reel 800/Tape & Reel
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NCP630
PACKAGE DIMENSIONS
D2PAK D2T SUFFIX CASE 936A-02 ISSUE C
-T-
OPTIONAL CHAMFER TERMINAL 6 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. TAB CONTOUR OPTIONAL WITHIN DIMENSIONS A AND K. 4. DIMENSIONS U AND V ESTABLISH A MINIMUM MOUNTING SURFACE FOR TERMINAL 6. 5. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH OR GATE PROTRUSIONS. MOLD FLASH AND GATE PROTRUSIONS NOT TO EXCEED 0.025 (0.635) MAXIMUM. INCHES MIN MAX 0.386 0.403 0.356 0.368 0.170 0.180 0.026 0.036 0.045 0.055 0.067 BSC 0.539 0.579 0.050 REF 0.000 0.010 0.088 0.102 0.018 0.026 0.058 0.078 5 _ REF 0.116 REF 0.200 MIN 0.250 MIN MILLIMETERS MIN MAX 9.804 10.236 9.042 9.347 4.318 4.572 0.660 0.914 1.143 1.397 1.702 BSC 13.691 14.707 1.270 REF 0.000 0.254 2.235 2.591 0.457 0.660 1.473 1.981 5 _ REF 2.946 REF 5.080 MIN 6.350 MIN
E V
U
A K B
12345
S H M N T R G L P
D 0.010 (0.254)
M
C
DIM A B C D E G H K L M N P R S U V
SOLDERING FOOTPRINT*
8.38 0.33 1.702 0.067 10.66 0.42 1.016 0.04
16.02 0.63
3.05 0.12
SCALE 3:1
mm inches
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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NCP630/D

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