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NCP5666 3.0 A, Low Dropout Linear Regulator with Enable
The NCP5666 is a high performance, low dropout linear regulator designed for high power applications that require up to 3.0 A current with Enable. A thermally robust, 5 pin D2PAK, combined with an architecture that offers low ground current (independent of load), provides for a superior high-current LDO solution.
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* * * * * * * * * * * * * * * * *
1% Output Voltage Accuracy Ultra-Fast Transient Response (Settling Time: 1-3 ms) Low Noise Without Bypass Capacitor (57 mVrms) Low Ground Current Independent of Load (3.0 mA Maximum) Enable Function Current Limit Protection Thermal Protection Power Supply Rejection Ratio > 65 dB Stable with Aluminum, Tantalum and Ceramic Capacitors Pin Compatible with Semtech Device This is a Pb-Free Device Servers ASIC Power Supplies Post Regulation for Power Supplies Constant Current Source Networking Equipment Gaming and STB Modules
Vin Vin Cin* NCP5666 EN Enable OFF ON * Cin - 4.7 mF to 220 mF recommended **Cout - 2.2 mF to 220 mF recommended See more details in the Application Information section GND Vout Cout** Vout
1 5 D2PAK CASE 936A
NC 5666DSxx AWLYWWG
xx
Applications
= Voltage Option = 25 = 2.5 V = 50 = 5.0 V A = Assembly Location WL = Wafer Lot Y = Year WW = Work Week G = Pb-Free Tab = GND Pin 1. Vin 2. EN 3. GND 4. NC 5. Vout
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet.
Figure 1. Typical Application Circuit
(c) Semiconductor Components Industries, LLC, 2007
1
October, 2007 - Rev. 1
Publication Order Number: NCP5666/D
NCP5666
PIN FUNCTION DESCRIPTION
Pin No. 1 2 3, Tab 4 5 Pin Name Vin EN GND NC Vout Positive Power Supply Input Voltage Enable. This pin allows for on/off control of the regulator. To disable the device, connect to GND. If this function is not in use, connect to Vin. Power Supply Ground Not Connected. PCB runs allowable. Regulated Output Voltage Description
Vin
Voltage Reference Block R3
Vref = 0.9 V Output Stage
Enable Block
EN
Vout Cc R1
R4 R2
GND
Figure 2. Block Diagram
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NCP5666
ABSOLUTE MAXIMUM RATINGS
Rating Input Voltage (Note 1) Output Pin Voltage Enable Pin Voltage Maximum Junction Temperature Storage Temperature Range Moisture Sensitivity Level ESD Capability, Human Body Model (Note 2) ESD Capability, Machine Model (Note 2) Symbol Vin Vout VEN TJ(max) Tstg MSL ESDHBM ESDMM Value 18 -0.3 to (Vin + 0.3) -0.3 to (Vin + 0.3) 150 -55 to +150 1 2000 200 Unit Vdc V V C C V V
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.
THERMAL CHARACTERISTICS
Rating Thermal Characteristics (Note 1) Thermal Resistance Junction-to-Ambient (Note 3) Thermal Resistance Junction-to-Case Symbol RJA RJC Value 45 5.0 Unit C/W
OPERATING RANGES
Rating Operating Input Voltage (Note 1) Operating Ambient Temperature Range 1. Refer to Electrical Characteristics and Application Information for Safe Operating Area. 2. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) JESD 22-A114-B Machine Model (MM) JESD 22-A115-A. 3. As measured using a copper heat spreading area of 650 mm2, 1 oz copper thickness. Symbol Vin TA Value (Vout + VDO) to 9 -40 to +85 Unit V C
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NCP5666
ELECTRICAL CHARACTERISTICS (Vin = Vout(nom) + 1.5 V, VEN = Vin, for typical values TA = 25C, for min/max values TA = -40C to 85C, Cin = 100 mF, Cout = 33 mF, unless otherwise noted. (Note 4))
Characteristic Output Voltage (Note 6) 2.5 V Regulator TA = 25C (Vin = 4.0 V to 7.0 V, Iout = 10 mA to 3.0 A) TA = -20 to +125C (Vin = 4.0 V to 7.0 V, Iout = 10 mA to 3.0 A) TA = -40 to +150C (Vin = 4.0 V to 7.0 V, Iout = 10 mA to 3.0 A) 5.0 V Regulator TA = 25C (Vin = 6.5 V to 7.0 V, Iout = 10 mA to 3.0 A) TA = -20 to +125C (Vin = 6.5 V to 7.0 V, Iout = 10 mA to 3.0 A) TA = -40 to +150C (Vin = 6.5 V to 7.0 V, Iout = 10 mA to 3.0 A) Line Regulation (Iout = 10 mA, Vout+1.5 V < Vin < 7.0 V) (Note 5) Load Regulation (10 mA < Iout < 3.0 A) (Note 5) Dropout Voltage (Iout = 3.0 A) Peak Output Current Limit Internal Current Limitation (Note 5) Ripple Rejection (120 Hz) (Note 5) Ripple Rejection (1 kHz) (Note 5) Output Noise Voltage (Vout = 2.5 V, Iout = 10 mA, Cout = 1.0 mF, f = 10 Hz to 100 kHz) (Note 5) Thermal Shutdown (Note 5) Ground Current (Iout = 3.0 A) 2.5 V Regulator 5.0 V Regulator Disable Current 2.5 V Regulator 5.0 V Regulator Enable Input Threshold Voltage Voltage Increasing, On state, Logic High Voltage Decreasing, Off state, Logic Low Enable Input Current (Note 5) Enable Pin Voltage = 0.3 Vmax Enable Pin Voltage = 1.3 Vmin REGline REGload VDO Iout Ilim RR Vn TSHD IGND IDIS Ven 1.3 Ien 0.5 0.5 mA 0.3 50 10 300 300 V 1.8 2.4 3.0 3.0 mA Symbol Vout 2.475 (-1%) 2.462 (-1.5%) 2.450 (-2%) 4.950 (-1%) 4.925 (-1.5%) 4.900 (-2%) 3.0 2.500 2.500 2.500 2.525 (+1%) 2.538 (+1.5%) 2.550 (+2%) 5.050 (+1%) 5.075 (+1.5%) 5.100 (+2%) 1.3 % % V A A dB mVrms C mA Min Typ Max Unit V
5.000 5.000 5.000 0.03 0.2 1.0 4.5 70 65 57 160
4. Performance guaranteed over specified operating conditions by design, guard banded test limits, and/or characterization, production tested at TJ = TA = 25C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 5. Typical values are based on design and/or characterization. 6. Other fixed output voltages available at 0.9 V, 1.2 V, 1.5 V, 1.8 V, 3.0 V, 3.3 V per request.
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NCP5666
TYPICAL CHARACTERISTICS
1.4 VDO, DROPOUT VOLTAGE (V) 1.2 Iout = 3.0 A 1.0 0.8 0.6 0.4 0.2 0.0 -50 Iout = 1.5 A VDO, DROPOUT VOLTAGE (V) 1.4 1.2 0C 1.0 -40C 0.8 25C 0.6 150C 0.4 0.2 0.0
Iout = 0.5 A
-25
0
25
50
75
100
125
150
0
0.5
1.0
1.5
2.0
2.5
3.0
TA, AMBIENT TEMPERATURE (C)
Iout, OUTPUT CURRENT (A)
Figure 1. Dropout Voltage vs. Ambient Temperature
5.10 5.08 Vout, OUTPUT VOLTAGE (V) 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 -50 -25 0 25 50 75 Vout(nom) = 5.0 V 100 125 150 Iout = 3.0 A Iout = 10 mA Vout, OUTPUT VOLTAGE (V) 2.55 2.54 2.53 2.52 2.51 2.50 2.49 2.48 2.47 2.46 2.45 -50
Figure 2. Dropout Voltage vs. Output Current
Iout = 10 mA
Iout = 3.0 A
Vout(nom) = 2.5 V -25 0 25 50 75 100 125 150
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 3. Output Voltage vs. Ambient Temperature
Figure 4. Output Voltage vs. Ambient Temperature
2.5 IGND, GROUND CURRENT (mA) Iout = 3.0 A IGND, GROUND CURRENT (mA) 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 -50 -25 0 25 50 75 Vout(nom) = 5.0 V 100 125 150
2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 -50 -25 0 25 50 75 Vout(nom) = 2.5 V 100 125 150 Iout = 3.0 A
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 5. Ground Current vs. Ambient Temperature
Figure 6. Ground Current vs. Ambient Temperature
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NCP5666
TYPICAL CHARACTERISTICS
70 IDIS, DISABLE CURRENT (mA) IDIS, DISABLE CURRENT (mA) 60 50 40 30 20 Vout(nom) = 5.0 V 10 0 -50 -25 VEN = 0 V 60 50 40 30 20 10 0 -50 -25 Vout(nom) = 2.5 V 0 25 50 75 100 125 150 70 VEN = 0 V
0
25
50
75
100
125
150
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 7. Disable Current vs. Ambient Temperature
Figure 8. Disable Current vs. Ambient Temperature
5.00 ISC, SHORT CIRCUIT LIMIT (A) 4.75 4.50 4.25 4.00 3.75 3.50 3.25 3.00 -50 -25 0 25 50 75 100 125 150 OUTPUT CURRENT (A)
1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 2 4 6 8 10 12 14 16 20 TA, AMBIENT TEMPERATURE (C) INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) TA = 25C L = 25 mm Copper
Figure 9. Short Circuit Current Limit vs. Ambient Temperature
10
Iout = 10 mA
Figure 10. Output Current vs. Input-Output Voltage Differential
90
RR, RIPPLE REJECTION (dB)
80 70 60
Unstable Region
Cout = 220 mF Cout = 22 mF Cout = 2.2 mF
1.0
ESR (W)
50 40 30 20 10 0 0 1.0 10
F, FREQUENCY (kHz) Cin = 100 nF Cout = 1.0 mF Iout = 1.0 A
0.1
Stable Region
0.01
100
1000
0.001 0.0
0.5
1.0 1.5 2.0 Iout, OUTPUT CURRENT (A)
2.5
3.0
Figure 11. Ripple Rejection vs. Frequency
Figure 12. Output Capacitor ESR Stability vs. Output Current
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NCP5666
TYPICAL CHARACTERISTICS
Vout 50 mV/Div
Vout 50 mV/Div
Cout = 150 mF
Cout = 150 mF
Iout 1.0 A/Div
Iout 1.0 A/Div
Iout = 3.0 A to 10 mA
Iout = 10 mA to 3.0 A TIME (1.0 ms/Div) TIME (1.0 ms/Div)
Figure 13. Load Transient Response
Figure 14. Load Transient Response
Vout 50 mV/Div
Vout 50 mV/Div
Cout = 150 mF
Cout = 150 mF
Iout 1.0 A/Div
Iout 1.0 A/Div
Iout = 10 mA to 3.0 A
Iout = 3.0 A to 10 mA
TIME (100 ns/Div)
TIME (100 ns/Div)
Figure 15. Load Transient Response
Figure 16. Load Transient Response
Vout 20 mV/Div
Cout = 10 mF
Vout 20 mV/Div
Cout = 10 mF
Iout = 10 mA to 3.0 A Iout 1.0 A/Div Iout 1.0 A/Div
Iout = 3.0 A to 10 mA
TIME (400 ns/Div)
TIME (10 ms/Div)
Figure 17. Load Transient Response
NOTE:
Figure 18. Load Transient Response
Typical characteristics were measured with the same conditions as electrical characteristics, unless otherwise noted.
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NCP5666
APPLICATION INFORMATION The NCP5666 is a high performance low dropout 3.0 A linear regulator with Enable suitable for high power applications. It is thermally robust and includes the safety features necessary during a fault condition, which provide for an attractive high current LDO solution for server, ASIC power supplies, networking equipment applications, and many others.
Input Capacitor Current Limit Operation
As the peak output current increases beyond its limitation, the device is internally clampled to 4.5 A, thus causing the output voltage to decrease and go out of regulation. This allows the device never to exceed the maximum power dissipation.
Input Voltage Operating Range
An input bypass capacitor is recommended to improve transient response or if the regulator is located more than a few inches from the power source. This will reduce the circuit's sensitivity to the input line impedance at high frequencies and significantly enhance the output transient response. Different types and different sizes of input capacitors can be chosen dependent on the quality of power supply. The range of 4.7 mF to 220 mF should cover most of the applications. The higher the capacitance, the lower change of input voltage due to line and load transients. The bypass capacitor should be mounted with shortest possible lead or track length directly across the regulator's input terminals.
Output Capacitor
The NCP5666 is guaranteed to protect itself from self destruction due to excessive power dissipation by activating current limit and thermal shutdown protections. These destructive situations can happen during very fast startup with large output capacitors or when output is short circuited. As long as the input voltage is lower than maximum operating voltage (9 V), the maximum power dissipation is never exceeded. If input voltage is between maximum operating voltage (9 V) and absolute maximum voltage (18 V) power dissipation must never exceed limits specified in Thermal Consideration section for safety operation. To use the device over maximum operating voltage the slow startup, not large output capacitors and no short circuit is recommended to maintain.
Thermal Consideration
The output capacitor is required for stability. The NCP5666 remains stable with ceramic, tantalum, and aluminum electrolytic capacitors with a minimum value of 2.2 mF. See Figure 12 for stable region of ESR for various output capacitors. The range of 2.2 mF to 220 mF should cover most of the applications. The higher the capacitance, the better load transient response. When a high value capacitor is used, a low value capacitor is also recommended to be put in parallel. The output capacitors should be placed as close as possible to the output pin of the device. This should help ensure ultrafast transient response times.
The maximum device power dissipation can be calculated by:
T P
D
+
J(max)
R
*T
A
qJA
The bipolar process employed for this IC is fully characterized and rated for reliable 18 V operation. To avoid damaging the part or degrading it's reliability, power dissipation transients should be limited to 30 W for D2PAK. For open-circuit to short-circuit transient, PDTransient = Vin(operating max) * ISC
ORDERING INFORMATION
Device NCP5666DS25R4G (Note 7) NCP5666DS50R4G (Note 7) Nominal Output Voltage 2.5 V 5.0 V Package D2PAK (Pb-Free) D2PAK (Pb-Free) 800 / Tape & Reel Shipping 800 / Tape & Reel
7. Other fixed output voltages available at 0.9 V, 1.2 V, 1.5 V, 1.8 V, 3.0 V, 3.3 V per request. 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.
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NCP5666
PACKAGE DIMENSIONS
D2PAK 5 CASE 936A-02 ISSUE D
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. DIM A B C D E G H K L M N P R S U V U1 V1 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 0.297 0.305 0.038 0.046 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 7.544 7.747 0.965 1.168
-TA K B
12345 OPTIONAL CHAMFER
E
U U1 V
S H M L
V1
D
0.010 (0.254) G
M
T R
N
P
C
SOLDERING FOOTPRINT*
8.38 0.33
1.702 0.067 10.66 0.42 1.016 0.04
3.05 0.12 16.02 0.63
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.
The products described herein (NCP5666), may be covered by one or more of the following U.S. patents: 5,920,184; 5,834,926. There may be other patents pending.
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
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NCP5666/D

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