ONSEMI NCP5666DS25R4G

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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MARKING
DIAGRAM
Features
•±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
Applications
•Servers
•ASIC Power Supplies
•Post Regulation for Power Supplies
•Constant Current Source
•Networking Equipment
•Gaming and STB Modules
Vout
Cin*
EN
D2PAK
CASE 936A
NC
5666DSxx
AWLYWWG
xx
= Voltage Option
= 25 = 2.5 V
= 50 = 5.0 V
A
= Assembly Location
WL = Wafer Lot
Y
= Year
WW = Work Week
G = Pb-Free
ORDERING INFORMATION
Vout
NCP5666
5
Tab = GND
Pin 1. Vin
2. EN
3. GND
4. NC
5. Vout
Vin
Vin
1
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
Cout**
GND
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
Figure 1. Typical Application Circuit
© Semiconductor Components Industries, LLC, 2007
October, 2007 - Rev. 1
1
Publication Order Number:
NCP5666/D
NCP5666
PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
Vin
Positive Power Supply Input Voltage
2
EN
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.
3, Tab
GND
4
NC
Not Connected. PCB runs allowable.
5
Vout
Regulated Output Voltage
Power Supply Ground
Vin
Voltage
Reference
Block
Vref = 0.9 V
R3
EN
Enable
Block
Vout
Output
Stage
Cc
R1
R4
R2
GND
Figure 2. Block Diagram
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2
NCP5666
ABSOLUTE MAXIMUM RATINGS
Symbol
Value
Unit
Input Voltage (Note 1)
Rating
Vin
18
Vdc
Output Pin Voltage
Vout
-0.3 to (Vin + 0.3)
V
Enable Pin Voltage
VEN
-0.3 to (Vin + 0.3)
V
TJ(max)
150
°C
Tstg
-55 to +150
°C
Maximum Junction Temperature
Storage Temperature Range
Moisture Sensitivity Level
MSL
1
-
ESD Capability, Human Body Model (Note 2)
ESDHBM
2000
V
ESD Capability, Machine Model (Note 2)
ESDMM
200
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
Symbol
Value
Unit
°C/W
Thermal Characteristics (Note 1)
Thermal Resistance Junction-to-Ambient (Note 3)
Thermal Resistance Junction-to-Case
RθJA
RθJC
45
5.0
Symbol
Value
Unit
Operating Input Voltage (Note 1)
Vin
(Vout + VDO) to 9
V
Operating Ambient Temperature Range
TA
-40 to +85
°C
OPERATING RANGES
Rating
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.
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3
NCP5666
ELECTRICAL CHARACTERISTICS (Vin = Vout(nom) + 1.5 V, VEN = Vin, for typical values TA = 25°C, for min/max values TA = -40°C
to 85°C, Cin = 100 mF, Cout = 33 mF, unless otherwise noted. (Note 4))
Characteristic
Symbol
Output Voltage (Note 6)
2.5 V Regulator
TA = 25°C (Vin = 4.0 V to 7.0 V, Iout = 10 mA to 3.0 A)
Min
Typ
Max
Vout
TA = -20 to +125°C (Vin = 4.0 V to 7.0 V, Iout = 10 mA to 3.0 A)
TA = -40 to +150°C (Vin = 4.0 V to 7.0 V, Iout = 10 mA to 3.0 A)
5.0 V Regulator
TA = 25°C (Vin = 6.5 V to 7.0 V, Iout = 10 mA to 3.0 A)
TA = -20 to +125°C (Vin = 6.5 V to 7.0 V, Iout = 10 mA to 3.0 A)
TA = -40 to +150°C (Vin = 6.5 V to 7.0 V, Iout = 10 mA to 3.0 A)
Unit
V
2.475
(-1%)
2.462
(-1.5%)
2.450
(-2%)
2.500
4.950
(-1%)
4.925
(-1.5%)
4.900
(-2%)
5.000
2.500
2.500
5.000
5.000
2.525
(+1%)
2.538
(+1.5%)
2.550
(+2%)
5.050
(+1%)
5.075
(+1.5%)
5.100
(+2%)
Line Regulation (Iout = 10 mA, Vout+1.5 V < Vin < 7.0 V) (Note 5)
REGline
-
0.03
-
%
Load Regulation (10 mA < Iout < 3.0 A) (Note 5)
REGload
-
0.2
-
%
Dropout Voltage (Iout = 3.0 A)
VDO
-
1.0
1.3
V
Peak Output Current Limit
Iout
3.0
-
-
A
Internal Current Limitation (Note 5)
Ilim
-
4.5
-
A
Ripple Rejection (120 Hz) (Note 5)
Ripple Rejection (1 kHz) (Note 5)
RR
-
70
65
-
dB
Output Noise Voltage
(Vout = 2.5 V, Iout = 10 mA, Cout = 1.0 mF, f = 10 Hz to 100 kHz) (Note 5)
Vn
-
57
-
mVrms
Thermal Shutdown (Note 5)
TSHD
-
160
-
°C
Ground Current (Iout = 3.0 A)
2.5 V Regulator
5.0 V Regulator
IGND
-
1.8
2.4
3.0
3.0
Disable Current
2.5 V Regulator
5.0 V Regulator
IDIS
-
50
10
300
300
Enable Input Threshold Voltage
Voltage Increasing, On state, Logic High
Voltage Decreasing, Off state, Logic Low
Ven
1.3
-
-
0.3
Enable Input Current (Note 5)
Ien
-
0.5
0.5
-
Enable Pin Voltage = 0.3 Vmax
Enable Pin Voltage = 1.3 Vmin
mA
mA
V
mA
4. Performance guaranteed over specified operating conditions by design, guard banded test limits, and/or characterization, production tested at
TJ = TA = 25°C. 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)
VDO, DROPOUT VOLTAGE (V)
1.4
1.2
Iout = 3.0 A
1.0
Iout = 1.5 A
0.8
0.6
Iout = 0.5 A
0.4
0.2
0.0
-50
-25
0
25
50
75
100
125
1.2
0°C
1.0 -40°C
0.8
25°C
0.6
150°C
0.4
0.2
0.0
150
0
0.5
5.10
2.55
5.08
2.54
5.06
5.04
Iout = 3.0 A
5.00
Iout = 10 mA
4.98
4.96
4.94
4.92
-25
0
25
50
75
100
3.0
125
2.52
2.51
Iout = 10 mA
2.50
2.49
Iout = 3.0 A
2.48
2.47
Vout(nom) = 2.5 V
2.45
-50
150
-25
0
25
50
75
100
125
150
TA, AMBIENT TEMPERATURE (°C)
Figure 4. Output Voltage vs. Ambient Temperature
Figure 3. Output Voltage vs. Ambient Temperature
2.0
2.4
IGND, GROUND CURRENT (mA)
2.5
IGND, GROUND CURRENT (mA)
2.5
2.53
TA, AMBIENT TEMPERATURE (°C)
Iout = 3.0 A
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
-50
2.0
2.46
Vout(nom) = 5.0 V
4.90
-50
1.5
Figure 2. Dropout Voltage vs. Output Current
Vout, OUTPUT VOLTAGE (V)
Vout, OUTPUT VOLTAGE (V)
Figure 1. Dropout Voltage vs. Ambient
Temperature
5.02
1.0
Iout, OUTPUT CURRENT (A)
TA, AMBIENT TEMPERATURE (°C)
Vout(nom) = 5.0 V
-25
0
25
50
75
100
125
1.9
1.8
1.7
1.5
1.4
1.3
1.2
1.1
1.0
-50
150
Iout = 3.0 A
1.6
Vout(nom) = 2.5 V
-25
0
25
50
75
100
125
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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5
150
NCP5666
TYPICAL CHARACTERISTICS
70
VEN = 0 V
60
IDIS, DISABLE CURRENT (mA)
IDIS, DISABLE CURRENT (mA)
70
50
40
30
20
Vout(nom) = 5.0 V
10
0
-50
-25
0
25
50
75
100
125
VEN = 0 V
60
50
40
30
20
10
Vout(nom) = 2.5 V
0
-50
150
-25
TA, AMBIENT TEMPERATURE (°C)
Figure 7. Disable Current vs. Ambient Temperature
4.75
75
100
125
150
TA = 25°C
L = 25 mm Copper
1.0
OUTPUT CURRENT (A)
ISC, SHORT CIRCUIT LIMIT (A)
50
1.2
4.50
4.25
4.00
3.75
3.50
0.8
0.6
0.4
0.2
3.25
-25
0.0
0
25
50
75
100
125
150
0
2
4
6
8
10
12
14
16
TA, AMBIENT TEMPERATURE (°C)
INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V)
Figure 9. Short Circuit Current Limit vs. Ambient
Temperature
Figure 10. Output Current vs. Input-Output
Voltage Differential
20
10
90
80
Unstable Region
Iout = 10 mA
70
1.0
Cout = 220 mF
Cout = 22 mF
60
ESR (W)
RR, RIPPLE REJECTION (dB)
25
Figure 8. Disable Current vs. Ambient Temperature
5.00
3.00
-50
0
TA, AMBIENT TEMPERATURE (°C)
50
40
30
Cin = 100 nF
Cout = 1.0 mF
Iout = 1.0 A
Cout = 2.2 mF
0.1
Stable Region
0.01
20
10
0
0
1.0
10
100
0.001
0.0
1000
F, FREQUENCY (kHz)
Figure 11. Ripple Rejection vs. Frequency
0.5
1.0
1.5
2.0
Iout, OUTPUT CURRENT (A)
2.5
Figure 12. Output Capacitor ESR Stability vs.
Output Current
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3.0
NCP5666
Vout
50 mV/Div
Vout
50 mV/Div
TYPICAL CHARACTERISTICS
Cout = 150 mF
Iout
1.0 A/Div
Iout
1.0 A/Div
Cout = 150 mF
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
Iout
1.0 A/Div
Iout = 10 mA to 3.0 A
Cout = 150 mF
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
Vout
20 mV/Div
Iout
1.0 A/Div
Vout
50 mV/Div
Cout = 150 mF
Cout = 10 mF
Cout = 10 mF
NOTE:
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 (400 ns/Div)
TIME (10 ms/Div)
Figure 17. Load Transient Response
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.
Current Limit Operation
Input 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.
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 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.
Thermal Consideration
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)
Nominal Output Voltage
Package
Shipping†
2.5 V
D2PAK
800 / Tape & Reel
(Pb-Free)
NCP5666DS50R4G (Note 7)
D2PAK
(Pb-Free)
5.0 V
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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8
NCP5666
PACKAGE DIMENSIONS
D2PAK 5
CASE 936A-02
ISSUE D
TERMINAL 6
-TOPTIONAL
CHAMFER
A
U
U1
E
S
K
B
V
V1
H
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.
1 2 3 4 5
M
D
0.010 (0.254)
M
T
G
N
DIM
A
B
C
D
E
G
H
K
L
M
N
P
R
S
U
V
U1
V1
L
P
R
C
SOLDERING FOOTPRINT*
8.38
0.33
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
1.702
0.067
10.66
0.42
1.016
0.04
3.05
0.12
16.02
0.63
SCALE 3:1
mm Ǔ
ǒinches
*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.
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For additional information, please contact your local
Sales Representative
NCP5666/D