ON NCP3335AMN330R2G Ultra high accuracy, low iq, 500 ma low dropout regulator Datasheet

NCP3335A
Ultra High Accuracy,
Low Iq, 500 mA
Low Dropout Regulator
The NCP3335A is a high performance, low dropout regulator. With
accuracy of ±0.9% over line and load and ultra−low quiescent current
and noise it encompasses all of the necessary features required by
today’s consumer electronics. This unique device is guaranteed to be
stable without a minimum load current requirement and stable with
any type of capacitor as small as 1.0 mF. The NCP3335A also comes
equipped with sense and noise reduction pins to increase the overall
utility of the device. The NCP3335A offers reverse bias protection.
http://onsemi.com
Micro8t
DM SUFFIX
CASE 846A
DFN10
MN SUFFIX
CASE 485C
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
High Accuracy Over Line and Load (+0.9% at 255C)
Ultra−Low Dropout Voltage at Full Load (260 mV typ.)
No Minimum Output Current Required for Stability
Low Noise (35 mVrms w/10 nF Cnr and 56 mVrms w/out Cnr)
Low Shutdown Current (0.07 mA)
Reverse Bias Protected
2.6 V to 12 V Supply Range
Thermal Shutdown Protection
Current Limitation
Requires Only 1.0 mF Output Capacitance for Stability
Stable with Any Type of Capacitor (including MLCC)
Available in 2.5 V, 2.85 V, 3.3 V, 5.0 V and Adjustable Output
Voltages
These are Pb−Free Devices
Applications
•
•
•
•
•
•
•
•
PCMCIA Card
Cellular Phones
Camcoders and Cameras
Networking Systems, DSL/Cable Modems
Cable Set−Top Box
MP3/CD Players
DSP Supply
Displays and Monitors
MARKING DIAGRAM
8
xxx
AYWG
G
1
1
3335A
xxx
ALYWG
G
Fixed Version
Pin 1, 2. Vout
3. Sense
4. GND
5. NR
6. SD
7, 8. Vin
Adj Version
Pin 1, 2. Vout
3. Adj
4. GND
5. NR
6. SD
7, 8. Vin
Fixed Version
Pin 1, 2. Vout
3. Sense
4. GND
5, 6. NC
7. NR
8. SD
9, 10. Vin
Adj Version
Pin 1, 2. Vout
3. Adj
4. GND
5, 6. NC
7. NR
8. SD
9, 10. Vin
Micro8
DFN10
xxx = LIQ for 2.5 V
xxx = 25 for 2.5 V
= LIR for 2.85 V
= 285 for 2.85 V
= LIS for 3.3 V
= 33 for 3.3 V
= LIT for 5.0 V
= 50 for 5.0 V
= LIO for Adj.
= ADJ for Adj.
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W = Work Week
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 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
April, 2006 − Rev. 3
1
Publication Order Number:
NCP3335A/D
NCP3335A
Cnr
(Optional)
5
NR
SENSE
7
IN
OUT
IN
OUT
2
8
Vin
Vout
1
+
Cin
1.0 mF
3
Cout
1.0 mF
GND
SD
6
+
4
ON
OFF
Figure 1. Typical Fixed Version Application Schematic (Micro8 Package)
Cnr
10 nF
(Optional)
5
NR
OUT
7
OUT
IN
8
Vin
ADJ
IN
2
1
3
R1
+
Cin
1.0 mF
SD
6
CADJ
68 pF
Vout
Cout
1.0 mF
+
R2
GND
4
ON
OFF
Figure 2. Typical Adjustable Version Application Schematic (Micro8 Package)
http://onsemi.com
2
NCP3335A
PIN FUNCTION DESCRIPTION
Fixed Version
Micro8
Pin No.
DFN10
Pin No.
Pin Name
1, 2
1, 2
Vout
3
3
SENSE
4
4
GND
5
7
NR
Noise Reduction Pin. This is an optional pin used to further reduce noise.
Description
Regulated output voltage. Bypass to ground with Cout w 1.0 mF.
For output voltage sensing, connect to Pins 1 and 2.
Power Supply Ground
6
8
SD
Shutdown pin. When not in use, this pin should be connected to the input pin.
7, 8
9, 10
Vin
Power Supply Input Voltage
−
5, 6
NC
Not Connected
−
EPAD
EPAD
Exposed thermal pad should be connected to ground.
Adjustable Version
Vout
Regulated output voltage. Bypass to ground with Cout w 1.0 mF.
3
Adj
Adjustable pin; reference voltage = 1.25 V.
4
GND
5
7
NR
Noise Reduction Pin. This is an optional pin used to further reduce noise.
6
8
SD
Shutdown pin. When not in use, this pin should be connected to the input pin.
7, 8
9, 10
Vin
Power Supply Input Voltage
−
5, 6
NC
Not Connected
−
EPAD
EPAD
1, 2
1, 2
3
4
Power Supply Ground
Exposed thermal pad should be connected to ground.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage
Vin
−0.3 to +16
V
Output Voltage
Vout
−0.3 to Vin +0.3 or 10 V*
V
Shutdown Pin Voltage
Vsh
−0.3 to +16
V
RqJA
238
°C/W
Operating Junction Temperature Range, Micro8
TJ
−40 to +150
°C
Storage Temperature Range
Tstg
−50 to+150
°C
Thermal Characteristics
Thermal Resistance, Junction−to−Air
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.
NOTE: 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
*Which ever is less. Reverse bias protection feature valid only if Vout − Vin ≤ 7 V.
THERMAL CHARACTERISTICS
Test Conditions (Typical Value)
Min Pad Board (Note 1)
1, Pad Board (Note 1)
Unit
Junction−to−Air, qJA
264
174
°C/W
Junction−to−Pin, yJL2
110
100
°C/W
Junction−to−Air, qJA
215
66
°C/W
Junction−to−Pin, yJL2
55
17
°C/W
Characteristic
Micro 8
10 Lead DFN EPad
1. As mounted on a 35 x 35 x 1.5 mm FR4 Substrate, with a single layer of a specified copper area of 2 oz (0.07 mm thick) copper traces and
heat spreading area. JEDEC 51 specifications for a low and high conductivity test board recommend a 2 oz copper thickness. Test conditions
are under natural convection or zero air flow.
http://onsemi.com
3
NCP3335A
ELECTRICAL CHARACTERISTICS − 2.5 V (Vout = 2.5 V typical, Vin = 2.9 V, TA = −40°C to +85°C, unless otherwise noted)
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 2.9 V to 6.5 V, Iload = 0.1 mA to 500 mA, TJ = 25°C
Characteristic
Vout
−0.9%
2.477
2.5
+0.9%
2.523
V
Output Voltage (Accuracy)
Vin = 2.9 V to 6.5 V, Iload = 0.1 mA to 500 mA, TJ = 0°C to +85°C
Vout
−1.4%
2.465
2.5
+1.4%
2.535
V
Output Voltage (Accuracy), (Note 2)
Vin = 2.9 V to 6.5 V, Iload = 0.1 mA to 500 mA, TJ = −40°C to +150°C
Vout
−1.5%
2.462
2.5
+1.5%
2.538
V
Line Regulation
Vin = 2.9 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 2.9 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See App Note)
Iload = 500 mA (Note 3)
Iload = 300 mA (Note 3)
Iload = 50 mA
Iload = 0.1mA
VDO
mV
340
230
110
10
Peak Output Current (See Figure 7)
Ipk
Short Output Current (See Figure 7)
Isc
Thermal Shutdown
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 3)
Iload = 300 mA (Note 3)
Iload = 50 mA
Iload = 0.1 mA
500
700
800
mA
900
mA
°C
160
IGND
9.0
4.6
0.8
−
In Dropout
Vin = 2.4 V, Iload = 0.1 mA
In Shutdown
SD = 0 V
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
0.07
14
7.5
2.5
190
mA
500
mA
1.0
mA
Vnoise
mVrms
mVrms
56
35
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
mA
2.0
0.4
V
V
ISD
0.07
1.0
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1.0
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 2.5 V)
IOUTR
10
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
2. For output current capability for TJ < 0°C, please refer to Figure 9.
3. TA must be greater than 0°C.
http://onsemi.com
4
mA
NCP3335A
ELECTRICAL CHARACTERISTICS − 2.85 V (Vout = 2.85 V typical, Vin = 3.25 V, TA = −40°C to +85°C, unless otherwise noted)
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 3.25 V to 6.85 V, Iload = 0.1 mA to 500 mA, TJ = 25°C
Characteristic
Vout
−0.9%
2.824
2.85
+0.9%
2.876
V
Output Voltage (Accuracy)
Vin = 3.25 V to 6.85 V, Iload = 0.1 mA to 500 mA, TJ = 0°C to +85°C
Vout
−1.4%
2.810
2.85
+1.4%
2.890
V
Output Voltage (Accuracy) (Note 4)
Vin = 3.25 V to 6.85 V, Iload = 0.1 mA to 500 mA, TJ = −40°C to +150°C
Vout
−1.5%
2.807
2.85
+1.5%
2.893
V
Line Regulation
Vin = 3.25 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 3.25 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See App Note)
Iload = 500 mA
Iload = 300 mA
Iload = 50 mA
Iload = 0.1mA
VDO
mV
340
230
110
10
Peak Output Current (See Figure 7)
Ipk
Short Output Current (See Figure 7)
Isc
Thermal Shutdown
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 5)
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
500
700
800
mA
900
mA
°C
160
IGND
In Dropout
Vin = 2.75 V, Iload = 0.1 mA
In Shutdown
SD = 0 V
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
9.0
4.6
0.8
−
14
7.5
2.5
190
−
500
mA
0.07
1.0
mA
Vnoise
mA
mVrms
mVrms
61
40
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
mA
2.0
0.4
V
V
ISD
0.07
1.0
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1.0
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 2.85 V)
IOUTR
10
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
4. For output current capability for TJ < 0°C, please refer to Figure 8.
5. TA must be greater than 0°C.
http://onsemi.com
5
mA
NCP3335A
ELECTRICAL CHARACTERISTICS – 3.3 V (Vout = 3.3 V typical, Vin = 3.7 V, TA = −40°C to +85°C, unless otherwise noted)
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 3.7 V to 7.3 V, Iload = 0.1 mA to 500 mA, TJ = 25°C
Characteristic
Vout
−0.9%
3.270
3.3
+0.9%
3.330
V
Output Voltage (Accuracy)
Vin = 3.7 V to 7.3 V, Iload = 0.1 mA to 500 mA, TJ = 0°C to +85°C
Vout
−1.4%
3.254
3.3
+1.4%
3.346
V
Output Voltage (Accuracy)
Vin = 3.7 V to 7.3 V, Iload = 0.1 mA to 500 mA, TJ = −40°C to +150°C
Vout
−1.5%
3.250
3.3
+1.5%
3.350
V
Line Regulation
Vin = 3.7 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 3.7 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See App Note)
Iload = 500 mA
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
VDO
Peak Output Current (See Figure 7)
Ipk
Short Output Current (See Figure 7)
Isc
Thermal Shutdown
TJ
mV
340
230
110
10
Ground Current
In Regulation
Iload = 500 mA (Note 6)
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
500
700
800
mA
900
mA
°C
160
IGND
In Dropout
Vin = 3.2 V, Iload = 0.1 mA
In Shutdown
SD = 0 V
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
9.0
4.6
0.8
−
14
7.5
2.5
190
mA
−
500
mA
0.07
1.0
mA
Vnoise
mVrms
mVrms
69
46
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
mA
2.0
0.4
V
V
ISD
0.07
1.0
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1.0
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 3.3 V)
IOUTR
10
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
6. TA must be greater than 0°C.
http://onsemi.com
6
mA
NCP3335A
ELECTRICAL CHARACTERISTICS – 5.0 V (Vout = 5.0 V typical, Vin = 5.4 V, TA = −40°C to +85°C, unless otherwise noted)
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 5.4 V to 9.0 V, Iload = 0.1 mA to 500 mA, TJ = 25°C
Characteristic
Vout
−0.9%
4.955
5.0
+0.9%
5.045
V
Output Voltage (Accuracy)
Vin = 5.4 V to 9.0 V, Iload = 0.1 mA to 500 mA, TJ = 0°C to +85°C
Vout
−1.4%
4.930
5.0
+1.4%
5.070
V
Output Voltage (Accuracy)
Vin = 5.4 V to 9.0 V, Iload = 0.1 mA to 500 mA, TJ = −40°C to +150°C
Vout
−1.5%
4.925
5.0
+1.5%
5.075
V
Line Regulation
Vin = 5.4 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 5.4 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See App Note)
Iload = 500 mA
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
VDO
Peak Output Current (See Figure 7)
Ipk
Short Output Current (See Figure 7)
Isc
Thermal Shutdown
TJ
mV
340
230
110
10
Ground Current
In Regulation
Iload = 500 mA (Note 7)
Iload = 300 mA (Note 7)
Iload = 50 mA
Iload = 0.1 mA
500
700
830
mA
930
mA
°C
160
IGND
In Dropout
Vin = Vout −0.1 V, Iload = 0.1 mA
In Shutdown
SD = 0 V
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
9.0
4.6
0.8
−
14
7.5
2.5
190
mA
−
500
mA
0.07
1.0
mA
Vnoise
mVrms
mVrms
93
58
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
mA
2.0
0.4
V
V
ISD
0.07
1.0
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1.0
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 5.0 V)
IOUTR
10
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
7. TA must be greater than 0°C.
http://onsemi.com
7
mA
NCP3335A
ELECTRICAL CHARACTERISTICS – Adjustable (Vout = 1.25 V typical, Vin = 2.9 V, TA = −40°C to +85°C, unless otherwise noted)
Symbol
Min
Typ
Max
Unit
Reference Voltage (Accuracy)
Vin = 2.9 V to Vout + 4.0 V, Iload = 0.1 mA to 500 mA, TJ = 25°C
Characteristic
Vref
−0.9%
1.239
1.25
+0.9%
1.261
V
Reference Voltage (Accuracy)
Vin = 2.9 V to Vout + 4.0 V, Iload = 0.1 mA to 500 mA, TJ = 0°C to +85°C
Vref
−1.4%
1.233
1.25
+1.4%
1.268
V
Reference Voltage (Accuracy) (Note 8)
Vin = 2.9 V to Vout + 4.0 V, Iload = 0.1 mA to 500 mA, TJ = −40°C to +150°C
Vref
−1.5%
1.231
1.25
+1.5%
1.269
V
Line Regulation
Vin = 2.9 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 2.9 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See App Note), Vout = 2.5 V to 10 V
Iload = 500 mA (Note 9)
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
VDO
Peak Output Current (Note 9) (See Figure 7)
Ipk
mV
340
230
110
10
Vout ≤ 3.3 V
Vout > 3.3 V
Short Output Current (See Figure 7)
Thermal Shutdown
500
Isc
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 9)
Iload = 300 mA (Note 9)
Iload = 50 mA
Iload = 0.1 mA
700
860
mA
900
990
mA
°C
160
IGND
In Dropout
Vin = Vout −0.1 V, Iload = 0.1 mA
In Shutdown
SD = 0 V
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
9.0
4.6
0.8
−
14
7.5
2.5
190
mA
−
500
mA
0.07
1.0
mA
Vnoise
mVrms
mVrms
38
26
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
2.0
0.4
Vin ≤ 5.4 V
Vin > 5.4 V
mA
V
V
ISD
0.07
1.0
5.0
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1.0
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = Vout (nom) ≤ 7 V) (Note 10)
IOUTR
1.0
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
8. For output current capability for TJ < 0°C, please refer to Figure 9.
9. TA must be greater than 0°C.
10. Reverse bias protection feature valid only if Vout − Vin ≤ 7 V.
http://onsemi.com
8
mA
NCP3335A
400
12
350
250
200
150
6
300 mA
4
50 mA
100
2
50
50 mA
0
0
0
20
40
60
80
100
120
140
TJ (°C)
0
80
TJ (°C)
Figure 3. Dropout Voltage vs. Temperature
Figure 4. Ground Current vs. Temperature
1000
2.540
900
2.530
800
2.520
700
Ipk (mA), Isc (mA)
2.550
2.510
2.500
2.490
2.480
40
60
100
120
140
Isc
Ipk
600
500
400
300
2.470
200
2.460
100
2.450
−40 −20
20
0
0
20
40
60
80
100
120
0
140
20
40
60
80
100
120
TJ (°C)
TJ (°C)
Figure 5. Output Voltage vs. Temperature
Figure 6. Peak and Short Current
vs. Temperature
0.97 Vout
Vout (V)
VOUT (V)
500 mA
8
300 mA
IGND (mA)
VDO (mV)
10
500 mA
300
Ipk
Isc
Iout (mA)
(For specific values of Ipk and Isc, please refer to Figure 6)
Figure 7. Output Voltage vs. Output Current
http://onsemi.com
9
140
NCP3335A
0.8
0.8
0.7
0.7
0°C
0.6
0.6
−20°C
−40°C
IOUT, (A)
IOUT (A)
0.5
0.4
0.3
0.1
3.5 3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6 2.5
VIN (V)
VIN, (V)
Figure 8. Output Current Capability for the
2.85 V Version
Figure 9. Output Current Capability for the
2.5 V Version
450
NOISE DENSITY (nV/ǠHz)
500
90
80
70
50 mA
250 mA
50
500 mA
40
30
Vout = 2.5 V
Cout = 10 mF
TJ = 25°C
Cout = 1.0 mF
Cnr = 0 nF
400
350
250
200
Cout = 1.0 mF
Cnr = 10 nF
150
100
Vout = 2.5 V
Iout = 500 mA
TJ = 25°C
0
0.1
1.0
10
0.01
100
Cout = 10 mF
Cnr = 0 nF
300
50
Cout = 10 mF
Cnr = 10 nF
0.1
1.0
10
F, FREQUENCY (kHz)
F, FREQUENCY (kHz)
Figure 10. Ripple Rejection vs. Frequency
Figure 11. Output Noise Density
5.10
OUTPUT VOLTAGE, VOUT (V)
0
0.01
−20°C
0
100
10
−30°C
0.3
0.1
20
−40°C
0.4
0.2
0
3.85 3.75 3.65 3.55 3.45 3.35 3.25 3.15 3.05 2.95 2.85
RR, RIPPLE REJECTION (dB)
0.5
0.2
60
−10°C
0°C
5.05
5.00
4.95
VOUT = 5 V
4.90
4.85
−40
−15
10
35
60
85
110
135 150
TEMPERATURE (°C)
Figure 12. Output Voltage vs. Temperature
http://onsemi.com
10
100
NCP3335A
350
300
300
250
qJA (°C/W)
1 oz CF
200
2 oz CF
150
200
150
1 oz CF
100
100
2 oz CF
50
50
0
0
100
200
300
400
500
COPPER HEAT SPREADING AREA
600
700
0
100
(mm2)
200
Vin at Data Sheet Test Conditions,
25°C, 1 mF Capacitance
10
Unstable Area
5.0
Stable Area
0
100
200
300
400
500
OUTPUT CURRENT (mA)
Figure 15. Stability with ESR vs. Iout
15
5 V, 0.1 mF
5 V, 10 mF
5 V, 1.0 mF
10
1.25 V, M8
5.0
Min ESR
0
0
100
400
500
600
700
(mm2)
Figure 14. DFN 10 Self Heating Thermal
Characteristic as a Function of Copper Area
on the PCB
15
0
300
COPPER HEAT SPREADING AREA
Figure 13. Micro 8 Self Heating Thermal
Characteristic as a Function of Copper Area
on the PCB
MAXIMUM ESR (W)
0
ESR (W)
qJA (°C/W)
250
200
300
400
OUTPUT CURRENT (mA)
Figure 16. Output Current vs. ESR
http://onsemi.com
11
500
NCP3335A
APPLICATIONS INFORMATION
Reverse Bias Protection
is recommended to further reduce output noise and improve
stability.
Reverse bias is a condition caused when the input voltage
goes to zero, but the output voltage is kept high either by a
large output capacitor or another source in the application
which feeds the output pin.
Normally in a bipolar LDO all the current will flow from
the output pin to input pin through the PN junction with
limited current capability and with the potential to destroy
the IC.
Due to an improved architecture, the NCP3335A can
withstand up to 7.0 V on the output pin with virtually no
current flowing from output pin to input pin, and only
negligible amount of current (tens of mA) flowing from the
output pin to ground for infinite duration.
Adjustable Operation
The output voltage can be set by using a resistor divider
as shown in Figure 2 with a range of 1.25 to 10 V. The
appropriate resistor divider can be found by solving the
equation below. The recommended current through the
resistor divider is from 10 mA to 100 mA. This can be
accomplished by selecting resistors in the kW range. As
result, the Iadj*R2 becomes negligible in the equation and
can be ignored.
ǒ
Ǔ
Vout + 1.25 * 1 ) R1 ) Iadj * R2
R2
(eq. 1)
Example:
For Vout = 2.9 V, can use R1 = 36 kW and R2 = 27 kW.
Input Capacitor
An input capacitor of at least 1.0 mF, any type, is
recommended to improve the transient response of the
regulator and/or if the regulator is located more than a few
inches from the power source. It will also reduce the circuit’s
sensitivity to the input line impedance at high frequencies.
The capacitor should be mounted with the shortest possible
track length directly across the regular’s input terminals.
ǒ
Ǔ
1.25 * 1 ) 36 kW + 2.91 V
27 kW
(eq. 2)
Dropout Voltage
The voltage dropout is measured at 97% of the nominal
output voltage.
Thermal Considerations
Output Capacitor
Internal thermal limiting circuitry is provided to protect the
integrated circuit in the event that the maximum junction
temperature is exceeded. This feature provides protection
from a catastrophic device failure due to accidental
overheating. This protection feature is not intended to be used
as a substitute to heat sinking. The maximum power that can
be dissipated, can be calculated with the equation below:
The NCP3335A remains stable with any type of capacitor
as long as it fulfills its 1.0 mF requirement. There are no
constraints on the minimum ESR and it will remain stable up
to an ESR of 5.0 W. Larger capacitor values will improve the
noise rejection and load transient response.
Noise Reduction Pin
Output noise can be greatly reduced by connecting a 10 nF
capacitor (Cnr) between the noise reduction pin and ground
(see Figure 1). In applications where very low noise is not
required, the noise reduction pin can be left unconnected.
For the adjustable version, in addition to the 10 nF Cnr, a
68 pF capacitor connected in parallel with R1 (see Figure 2)
PD +
TJ(max) * TA
RqJA
(eq. 3)
For improved thermal performance, contact the factory
for the DFN package option. The DFN package includes an
exposed metal pad that is specifically designed to reduce the
junction to air thermal resistance, RqJA.
http://onsemi.com
12
NCP3335A
ORDERING INFORMATION
Nominal Output Voltage
Package
Shipping †
NCP3335ADM250R2G
2.5 V
Micro8
(Pb−Free)
4000 / Tape & Reel
NCP3335ADM285R2G
2.85 V
Micro8
(Pb−Free)
4000 / Tape & Reel
NCP3335ADM330R2G
3.3 V
Micro8
(Pb−Free)
4000 / Tape & Reel
NCP3335ADM500R2G
5.0 V
Micro8
(Pb−Free)
4000 / Tape & Reel
NCP3335ADMADJR2G
Adj.
Micro8
(Pb−Free)
4000 / Tape & Reel
NCP3335AMN250R2G
2.5 V
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3335AMN285R2G
2.85 V
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3335AMN330R2G
3.3 V
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3335AMN500R2G
5.0 V
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3335AMNADJR2G
Adj.
DFN10
(Pb−Free)
3000 / Tape & Reel
Device
†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.
*Please contact factory for other voltage options.
http://onsemi.com
13
NCP3335A
PACKAGE DIMENSIONS
Micro8
CASE 846A−02
ISSUE G
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED
0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE.
5. 846A−01 OBSOLETE, NEW STANDARD 846A−02.
D
HE
PIN 1 ID
E
DIM
A
A1
b
c
D
E
e
L
HE
e
b 8 PL
0.08 (0.003)
M
T B
S
A
S
SEATING
−T− PLANE
0.038 (0.0015)
MILLIMETERS
NOM
MAX
−−
1.10
0.08
0.15
0.33
0.40
0.18
0.23
3.00
3.10
3.00
3.10
0.65 BSC
0.40
0.55
0.70
4.75
4.90
5.05
MIN
−−
0.05
0.25
0.13
2.90
2.90
A
A1
L
c
SOLDERING FOOTPRINT*
8X
1.04
0.041
0.38
0.015
3.20
0.126
6X
8X
4.24
0.167
0.65
0.0256
5.28
0.208
SCALE 8:1
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.
http://onsemi.com
14
INCHES
NOM
−−
0.003
0.013
0.007
0.118
0.118
0.026 BSC
0.021
0.016
0.187
0.193
MIN
−−
0.002
0.010
0.005
0.114
0.114
MAX
0.043
0.006
0.016
0.009
0.122
0.122
0.028
0.199
NCP3335A
PACKAGE DIMENSIONS
DFN10
CASE 485C−01
ISSUE A
D
PIN 1
REFERENCE
A
B
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
L1
E
DETAIL A
Bottom View
(Optional)
0.15 C
2X
TOP VIEW
0.15 C
2X
DIM
A
A1
A3
b
D
D2
E
E2
e
K
L
L1
(A3)
DETAIL B
0.10 C
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
5. TERMINAL b MAY HAVE MOLD COMPOUND
MATERIAL ALONG SIDE EDGE. MOLD
FLASHING MAY NOT EXCEED 30 MICRONS
ONTO BOTTOM SURFACE OF TERMINAL b.
6. DETAILS A AND B SHOW OPTIONAL VIEWS
FOR END OF TERMINAL LEAD AT EDGE OF
PACKAGE.
EDGE OF PACKAGE
A
10X
0.08 C
SIDE VIEW
D2
10X
SEATING
PLANE
A1
C
DETAIL A
e
L
1
MOLD CMPD
5
E2
10X
K
EXPOSED Cu
A3
A1
DETAIL B
Side View
(Optional)
10
10X
6
b
0.10 C A B
0.05 C
ÉÉ
ÉÉ
MILLIMETERS
MIN
MAX
0.80
1.00
0.00
0.05
0.20 REF
0.18
0.30
3.00 BSC
2.45
2.55
3.00 BSC
1.75
1.85
0.50 BSC
0.19 TYP
0.35
0.45
0.00
0.03
BOTTOM VIEW
NOTE 3
The products described herein NCP3335A, may be covered by one or more of the following U.S. patents; 5,920,184, 5,966,004, and 5,834,926. There may
be other patents pending.
Micro8 is a trademark of International Rectifier.
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:
N. American Technical Support: 800−282−9855 Toll Free
Literature Distribution Center for ON Semiconductor
USA/Canada
P.O. Box 61312, Phoenix, Arizona 85082−1312 USA
Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center
2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051
Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada
Phone: 81−3−5773−3850
Email: [email protected]
http://onsemi.com
15
ON Semiconductor Website: http://onsemi.com
Order Literature: http://www.onsemi.com/litorder
For additional information, please contact your
local Sales Representative.
NCP3335A/D