NCP705
500 mA, Ultra-Low
Quiescent Current, I
Q
13
mA,
Ultra-Low Noise, LDO
Voltage Regulator
Noise sensitive RF applications such as Power Amplifiers in
satellite radios, infotainment equipment, and precision
instrumentation require very clean power supplies. The NCP705 is
500 mA LDO that provides the engineer with a very stable, accurate
voltage with ultra low noise and very high Power Supply Rejection
Ratio (PSRR) suitable for RF applications. The device doesn’t require
any additional noise bypass capacitor to achieve ultra−low noise
performance. In order to optimize performance for battery operated
portable applications, the NCP705 employs dynamic Iq management
for ultra−low quiescent current consumption at light−load conditions
and great dynamic performance.
Features
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MARKING
DIAGRAM
WDFN6
CASE 511BR
1
XX M
XX = Specific Device Code
M = Date Code
PIN CONNECTIONS
•
Operating Input Voltage Range: 2.5 V to 5.5 V
•
Available − Fixed Voltage Option: 0.8 V to 3.5 V
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Available
− Adjustable Voltage Option: 0.8 V to 5.5 V−V
DROP
Reference Voltage 0.8 V
Ultra−Low Quiescent Current of Typ. 13
mA
Ultra−Low Noise: 12
mV
RMS
from 100 Hz to 100 kHz
Very Low Dropout: 230 mV Typical at 500 mA
±2%
Accuracy Over Load/Line/Temperature
High PSRR: 71 dB at 1 kHz
Internal Soft−Start to Limit the Turn−On Inrush Current
Thermal Shutdown and Current Limit Protections
Stable with a 1
mF
Ceramic Output Capacitor
Active Output Discharge for Fast Turn−Off
These are Pb−Free Devices
OUT
N/C
GND
1
2
3
GND
6 IN
5 N/C
4 EN
OUT
ADJ
GND
1
2
3
GND
6 IN
5 N/C
4 EN
WDFN6 2x2 mm
(Top View)
Adjustable Version
(Top View)
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 19 of this data sheet.
Typical Applications
PDAs, Mobile Phones, GPS, Smartphones
Wireless Handsets, Wireless LAN, Bluetooth®, ZigBee®
Portable Medical Equipment
Other Battery Powered Applications
V
IN
C
IN
1
mF
ON
OFF
IN
OUT
NCP705
EN
N/C
GND
V
OUT
C
OUT
1
mF
V
IN
1
mF
C
IN
OFF
OUT
NCP705
EN
ADJ
ON
GND
IN
V
OUT
R
1
C
1
C
OUT
1
mF
R
2
Adjustable Voltage Version
Fixed Voltage Version
Figure 1. Typical Application Schematics
©
Semiconductor Components Industries, LLC, 2014
1
December, 2017 − Rev. 8
Publication Order Number:
NCP705/D
NCP705
IN
ENABLE
LOGIC
THERMAL
SHUTDOWN
EN
UVLO
BANDGAP
REFERENCE
INTEGRATED
SOFT−START
MOSFET
DRIVER WITH
CURRENT LIMIT
AUTO LOW
POWER MODE
OUT
ACTIVE
DISCHARGE
EN
GND
IN
ENABLE
LOGIC
THERMAL
SHUTDOWN
EN
UVLO
BANDGAP
REFERENCE
INTEGRATED
SOFT−START
MOSFET
DRIVER WITH
CURRENT LIMIT
OUT
AUTO LOW
POWER MODE
ACTIVE
DISCHARGE
ADJ
EN
GND
Figure 2. Simplified Schematic Block Diagrams
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2
NCP705
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
1
2
3
4
5
6
Pin Name −
Fixed
OUT
N/C
GND
EN
N/C
IN
Pin Name −
Adjustable
OUT
ADJ
GND
EN
N/C
IN
Description
Regulated output voltage pin. A small 1
mF
ceramic capacitor is needed from this pin to
ground to assure stability.
Feedback pin for set−up output voltage. Use resistor divider for voltage selection.
Power supply ground. Expose pad must be tied with GND pin. Soldered to the copper
plane allows for effective heat dissipation.
Enable pin. Driving EN over 0.9 V turns on the regulator. Driving EN below 0.4 V puts
the regulator into shutdown mode.
Not connected. This pin can be tied to ground to improve thermal dissipation.
Input pin. A small capacitor is needed from this pin to ground to assure stability.
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage (Note 1)
Output Voltage
Enable Input
Adjustable Input
Output Short Circuit Duration
Maximum Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 2)
ESD Capability, Machine Model (Note 2)
Symbol
V
IN
V
OUT
V
EN
V
ADJ
t
SC
T
J(MAX)
T
STG
ESD
HBM
ESD
MM
Value
−0.3 V to 6 V
−0.3 V to V
IN
+ 0.3 V
−0.3 V to V
IN
+ 0.3 V
−0.3 V to V
IN
+ 0.3 V
Indefinite
150
−55 to 150
2000
200
Unit
V
V
V
V
s
°C
°C
V
V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
Latchup Current Maximum Rating tested per JEDEC standard: JESD78.
Table 3. THERMAL CHARACTERISTICS
(Note 3)
Rating
Thermal Characteristics, WDFN6 2x2 mm
Thermal Resistance, Junction−to−Air
Thermal Resistance Parameter, Junction−to−Board
3. Single component mounted on 1 oz, FR 4 PCB with 645 mm
2
Cu area.
Symbol
q
JA
Y
JB
Value
116.5
30
Unit
°C/W
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3
NCP705
Table 4. ELECTRICAL CHARACTERISTICS
−40°C
≤
T
J
≤
125°C; V
IN
= V
OUT(NOM)
+ 0.5 V or 2.5 V, whichever is greater; V
EN
= 0.9 V, I
OUT
= 10 mA, C
IN
= C
OUT
= 1
mF
unless
otherwise noted. Typical values are at T
J
= +25°C. (Note 4)
Parameter
Operating Input Voltage
Output Voltage Range (Adjustable)
Undervoltage Lock−out
Output Voltage Accuracy (Fixed)
Reference Voltage
Reference Voltage Accuracy
Line Regulation
Load Regulation
Load Transient
Dropout Voltage (Note 5)
Output Current Limit
I
OUT
= 10 mA
V
OUT
+ 0.5 V
≤
V
IN
≤
4.5 V, I
OUT
= 10 mA
V
OUT
+ 0.5 V
≤
V
IN
≤
5.5 V, I
OUT
= 10 mA
I
OUT
= 0 mA to 500 mA
I
OUT
= 1 mA to 500 mA or 500 mA to 1 mA in
1
ms,
C
OUT
= 1
mF
I
OUT
= 500 mA, V
OUT(nom)
= 2.8 V
V
OUT
= 90% V
OUT(nom)
NCP705
NCP705E
(0°C
≤
T
J
≤
70°C)
Quiescent Current
Ground Current
Shutdown Current
I
OUT
= 0 mA
I
OUT
= 500 mA
V
EN
≤
0.4 V, T
J
= +25°C
V
EN
≤
0 V, V
IN
= 2.0 to 4.5 V, T
J
= −40 to +85°C
EN Pin Threshold Voltage
High Threshold
Low Threshold
EN Pin Input Current
ADJ Pin Current
Turn−On Time
Power Supply Rejection Ratio
V
EN
Voltage increasing
V
EN
Voltage decreasing
V
EN
= 5.5 V
V
ADJ
= 0.8 V
C
OUT
= 1.0
mF,
from assertion EN pin to 98%
V
OUT(nom)
V
IN
= 3.8 V, V
OUT
= 2.8 V
(Fixed), I
OUT
= 500 mA
f = 100 Hz
f = 1 kHz
f = 10 kHz
t
ON
PSRR
I
Q
I
GND
I
DIS
I
DIS
V
EN_HI
V
EN_LO
I
EN
0.9
0.4
100
1
150
73
71
56
12
160
−
20
−
500
nA
nA
ms
dB
V
IN
rising
V
OUT
+ 0.5 V
≤
V
IN
≤
5.5 V, I
OUT
= 0 − 500 mA
Test Conditions
Symbol
V
IN
V
OUT
UVLO
V
OUT
V
REF
V
REF
Reg
LINE
Reg
LOAD
Tran
LOAD
V
DO
I
CL
510
600
−2
550
750
12
±120
230
750
750
13
260
0.12
0.55
2
350
950
950
25
mA
mA
mA
mA
V
Min
2.5
0.8
1.2
−2
0.8
+2
1.6
Typ
Max
5.5
5.5−
V
DO
1.9
+2
Unit
V
V
V
%
V
%
mV/V
mV/mA
mV
mV
mA
Output Noise Voltage
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V
OUT
= 2.5 V (Fixed), V
IN
= 3.5 V, I
OUT
= 500 mA
f = 100 Hz to 100 kHz
Temperature increasing from T
J
= +25°C
Temperature falling from T
SD
V
N
T
SD
T
SDH
mV
rms
°C
°C
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
4. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at T
J
= T
A
= 25_C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
5. Characterized when V
OUT
falls 100 mV below the regulated voltage at V
IN
= V
OUT(NOM)
+ 0.5 V.
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NCP705
TYPICAL CHARACTERISTICS
10
OUTPUT VOLTAGE NOISE (mV/rtHz)
1
I
OUT
= 10 mA
I
OUT
= 500 mA
I
OUT
10 mA
100 mA
V
IN
= 2.5 V
V
OUT
= 0.8 V
C
IN
= C
OUT
= 1
mF
MLCC, X7R,
1206 size
0.1
1
300 mA
I
OUT
= 100 mA
I
OUT
= 300 mA
10
100
1000
500 mA
RMS Output Noise (mV)
10 Hz − 100 kHz
19.06
15.99
14.42
13.70
100 Hz − 100 kHz
18.21
15.04
13.39
12.60
0.1
0.01
0.001
0.01
FREQUENCY (kHz)
Figure 3. Output Voltage Noise Spectral Density for V
OUT
= 0.8 V, C
OUT
= 1
mF
10
OUTPUT VOLTAGE NOISE (mV/rtHz)
I
OUT
= 100 mA
I
OUT
= 10 mA
0.1
V
IN
= 2.5 V
V
OUT
= 0.8 V
C
IN
= 1
mF
C
OUT
= 10
mF
MLCC, X7R,
1206 size
0.1
1
I
OUT
10 mA
100 mA
300 mA
I
OUT
= 500 mA
I
OUT
= 300 mA
10
100
1000
500 mA
RMS Output Noise (mV)
10 Hz − 100 kHz
16.17
16.41
14.94
14.08
100 Hz − 100 kHz
15.28
15.65
14.10
13.11
1
0.01
0.001
0.01
FREQUENCY (kHz)
Figure 4. Output Voltage Noise Spectral Density for V
OUT
= 0.8 V, C
OUT
= 10
mF
10
OUTPUT VOLTAGE NOISE (mV/rtHz)
1
I
OUT
= 100 mA
I
OUT
= 300 mA
I
OUT
10 mA
V
IN
= 3.8 V
V
OUT
= 3.3 V
C
IN
= C
OUT
= 1
mF
MLCC, X7R,
1206 size
0.1
1
100 mA
300 mA
I
OUT
= 500 mA
I
OUT
= 10 mA
10
100
1000
500 mA
RMS Output Noise (mV)
10 Hz − 100 kHz
18.12
16.42
16.35
16.00
100 Hz − 100 kHz
15.39
13.50
12.47
12.10
0.1
0.01
0.001
0.01
FREQUENCY (kHz)
Figure 5. Output Voltage Noise Spectral Density for V
OUT
= 3.3 V, C
OUT
= 1
mF
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