Datasheet ISL9014A Datasheet (intersil)

Page 1
®
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ISL9014A
Data Sheet March 11, 2008
Dual LDO with Low Noise, Low IQ, and High PSRR
A reference bypass pin allows an external capacitor for adjusting a noise filter for low noise and high PSRR applications.
The quiescent current is typically only 45µA with both LDOs enabled and active. Separate enable pins control each individual LDO output. When both enable pins are low, the device is in shutdown, typically drawing less than 0.1µA.
Several combinations of voltage outputs are standard. Output voltage options for each LDO range from 1.5V to
3.3V. Other output voltage options are available on request.
Pinout
ISL9014A
(10 LD 3x3 DFN)
TOP VIEW
VIN EN1 EN2
CBYP
NC
1 2 3 4 5
10
VO1
9
VO2
8
NC NC
7 6
GND
FN6438.1
Features
• Integrates two high performance LDOs
- VO1 - 300mA output
- VO2 - 300mA output
• Excellent transient response to large current steps
• Excellent load regulation: <1% voltage change across full range of load current
• High PSRR: 70dB @ 1kHz
• Wide input voltage capability: 2.3V to 6.5V
• Extremely low quiescent current: 45µA (both LDOs active)
• Low dropout voltage: typically 200mV @ 300mA
• Low output noise: typically 30µV
@ 100µA (1.5V)
RMS
• Stable with 1µF to 10µF ceramic capacitors
• Separate enable pins for each LDO
• Soft-start to limit input current surge during enable
• Current limit and overheat protection
• ±1.8% accuracy over all operating conditions
• Tiny 10 Ld 3mmx3mm DFN package
• -40°C to +85°C operating temperature range
• Pin compatible with Micrel MIC2211
• Pb-free (RoHS compliant)
Applications
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Handheld Devices including Medical Handhelds
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved.
Page 2
Ordering Information
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ISL9014A
PART NUMBER
(Notes 1, 2, 3) PART MARKING VO1 VOLTAGE VO2 VOLTAGE TEMP RANGE (°C)
ISL9014AIRNNZ DKNA 3.3V 3.3V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRNJZ DKMA 3.3V 2.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRNFZ DKLA 3.3V 2.5V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRNCZ DKKA 3.3V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRMNZ DKJA 3.0V 3.3V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRMMZ DKHA 3.0V 3.0V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRMGZ DKGA 3.0V 2.7V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRLLZ DKFA 2.9V 2.9V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRKNZ DKDA 2.85V 3.3V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRKKZ DKCA 2.85V 2.85V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRKJZ DKBA 2.85V 2.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRKFZ DJYA 2.85V 2.5V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRKPZ DKEA 2.85V 1.85V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRKCZ DJWA 2.85V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRJNZ DJTA 2.8V 3.3V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRJMZ DJSA 2.8V 3.0V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRJRZ DJVA 2.8V 2.6V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRJCZ DJRA 2.8V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRJBZ DJPA 2.8V 1.5V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRGPZ DJNA 2.7V 1.85V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRGCZ DJMA 2.7V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRFJZ DJLA 2.5V 2.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRFDZ DJKA 2.5V 2.0V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRFCZ DJJA 2.5V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRPLZ DKPA 1.85V 2.9V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRPPZ DKRA 1.85V 1.85V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRCJZ DJHA 1.8V 2.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRCCZ DJGA 1.8V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRBLZ DJFA 1.5V 2.9V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRBJZ DJEA 1.5V 2.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRBCZ DJDA 1.5V 1.8V -40 to +85 10 Ld 3x3 DFN L10.3x3C ISL9014AIRBBZ DJCA 1.5V 1.5V -40 to +85 10 Ld 3x3 DFN L10.3x3C
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. For availability and lead time of devices with voltage combinations not listed in the table, contact Intersil Marketing.
3. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
PACKAGE
(Pb-Free) PKG. DWG. #
2
FN6438.1
March 11, 2008
Page 3
ISL9014A
www.BDTIC.com/Intersil
Absolute Maximum Ratings Thermal Information
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7.1V
V
O1, VO2
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V
Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.6V
+0.3)V
IN
Recommended Operating Conditions
Ambient Temperature Range (TA) . . . . . . . . . . . . . . .-40°C to +85°C
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3V to 6.5V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTES:
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
4. θ
JA
Tech Brief TB379.
, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
5. θ
JC
Thermal Resistance (Notes 4, 5) θ
3x3 DFN Package . . . . . . . . . . . . . . . . 50 10
Junction Temperature Range . . . . . . . . . . . . . . . . .-40°C to +125°C
Operating Temperature Range . . . . . . . . . . . . . . . . .-40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Electrical Specifications Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature
range of the device as follows: T C
= 1µF; CO = 1µF; C
IN
PARAMETER SYMBOL TEST CONDITIONS
DC CHARACTERISTICS
Supply Voltage V Ground Current Quiescent condition: I
Shutdown Current I UVLO Threshold V
Regulation Voltage Accuracy Variation from nominal volt age output, V
Line Regulation V Load Regulation I
Maximum Output Current I
Internal Current Limit I Dropout Voltage (Note 6) V
Thermal Shutdown Temperature T
AC CHARACTERISTICS
Ripple Rejection I
IN
I
DD1
I
DD2 DDS
UV+
V
UV-
MAX
LIM DO1IO
V
DO2IO
V
DO3IO
V
DO4IO SD+
T
SD-
One LDO active 25 40 µA Both LDO active 45 60 µA @ +25°C 0.1 1.0 µA
T
= -40°C to +125°C
J
= (V
IN
OUT
I
OUT
VO1: Continuous 300 mA VO2: Continuous 300 mA
= 150mA; VO > 2.1V 125 200 mV = 300mA; VO < 2.5V 300 500 mV = 300mA; 2.5V ≤ VO ≤ 2.8V 250 400 mV = 300mA; VO > 2.8V 200 325 mV
= 10mA, VIN = 2.8V(min), VO = 1.8V, C
O
@ 1kHz 70 dB @ 10kHz 55 dB @ 100kHz 40 dB
BYP
+ 1.0V relative to highest output voltage) to 5.5V -0.2 0 0.2 %/V
OUT
= 100µA to 150mA 0.1 0.7 % = 100µA to 300mA 1.0 %
= -40°C to +85°C; VIN = (VO+ 1.0V) to 6.5V with a minimum VIN of 2.3V;
A
= 0.01µF
MIN
(Note 7) TYP
2.3 6.5 V
= 0µA; IO2 = 0µA
O1
1.9 2.1 2.3 V
1.6 1.8 2.0 V
= VO+0.5V to 5.5V ,
IN
= 0.1µF
BYP
-1.8 +1.8 %
350 475 600 mA
(°C/W) θJC (°C/W)
JA
MAX
(Note 7) UNITS
145 °C 110 °C
3
FN6438.1
March 11, 2008
Page 4
ISL9014A
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Electrical Specifications Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature
range of the device as follows: T
= 1µF; CO = 1µF; C
C
IN
PARAMETER SYMBOL TEST CONDITIONS
Output Noise Voltage IO = 100µA, VO = 1.5V, TA = +25°C, C
DEVICE START-UP CHARACTERISTICS
Device Enable tIme t
LDO Soft-Start Ram p Rate t
EN1, EN2 PIN CHARACTERISTICS
Input Low Voltage V Input High Voltage V Input Leakage Current I Pin Capacitance C
NOTES:
6. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V.
7. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.
IL
BW = 10Hz to 100kHz
Time from assertion of the ENx pin to when the output voltage
EN
reaches 95% of the VO(nom) Slope of linear portion of LDO output voltage ramp during
SSR
start-up
IL IH
, I
IH
Informative 5 pF
PIN
BYP
= -40°C to +85°C; VIN = (VO+ 1.0V) to 6.5V with a minimum VIN of 2.3V;
A
= 0.01µF (Continued)
MIN
(Note 7) TYP
BYP
= 0.1µF
-0.3 0.5 V
1.4 VIN+0.3 V
30 µV
250 500 µs
30 60 µs/V
MAX
(Note 7) UNITS
0.1 µA
RMS
4
FN6438.1
March 11, 2008
Page 5
Typical Performance Curves
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0.8
0.6
0.4
(%)
O
0.2
0.0
-0.2
-0.4
OUTPUT VOLTAGE, V
-0.6
-0.8
3.8 4.2 6.25.8 INPUT VOLTAGE (V)
FIGURE 1. OUTPUT VOLT AGE vs INPUT VOL T AGE
(3.3V OUTPUT)
-40°C
+25°C
+85°C
VO = 3.3V I
= 0mA
LOAD
ISL9014A
6.63.4 4.6 5.0 5.4
0.10
+25°C
(mA)
O
VIN = 3.8V V
= 3.3V
O
-40°C
-0.02
-0.04
-0.06
OUTPUT VOLTAGE CHANGE (%)
-0.08
-0.10
0.08
0.06
0.04
0.02
0.00
+85°C
50 150 250 350
100 200 300 4000
LOAD CURRENT - I
FIGURE 2. OUTPUT VOLTAGE CHANGE vs LOAD CURRENT
0.10
0.08
0.06
0.04
0.02
0.00
-0.02
-0.04
-0.06
OUTPUT VOLTAGE CHANGE (%)
-0.08
-0.10
VIN = 3.8V
= 3.3V
V
O
I
= 0mA
LOAD
-10 20 50 110-40
-25 5 35 8065 95 125 TEMPERATURE (°C)
3.4
IO = 0mA
3.3
(V)
O
3.2
3.1
3.0
OUTPUT VOLTAGE, V
2.9
2.8
3.1 3.6 4.1 4.6 5.1 6.15.6
IO = 150mA
IO = 300mA
INPUT VOLTAGE (V)
VO = 3.3V
FIGURE 3. OUTPUT VOLTAGE CHANGE vs TEMPERATURE FIGURE 4. OUTPUT VOLTAGE vs INPUT VOL TAGE
(3.3V OUTPUT)
2.9
2.8
(V)
O
2.7
2.6
2.5
OUTPUT VOLTAGE, V
2.4
IO = 0mA
IO = 300mA
VO2 = 2.8V
IO = 150mA
(mV)
DROPOUT VOLTAGE, V
DO
350
300
250
VO = 2.8V
200
VO = 3.3V
150
100
50
6.5
2.3
2.63.13.64.14.65.1 6.1 INPUT VOLTAGE (V)
5.6
FIGURE 5. OUTPUT VOLT AGE vs INPUT VOL T AGE
6.5
0
FIGURE 6. DROPOUT VOLTAGE vs LOAD CURRENT
(VO2 = 2.8V)
5
50 100 150 200 250 300 350 4000
OUTPUT LOAD (mA)
FN6438.1
March 11, 2008
Page 6
Typical Performance Curves (Continued)
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ISL9014A
175
VO1 = 3.3V
150
(mV)
125
DO
100
75
50
DROPOUT VOLTAGE, V
25
0
25 50 75 100 125 150 175 2000
OUTPUT LOAD (mA)
+85°C
+25°C
-40°C
55
50
+125°C
45
40
35
GROUND CURRENT (µA)
30
25
3.0 3.5 4.58 5.5 6.0
4.0 5.0 6.5 INPUT VOLTAGE (V)
VO1 = 3.3V VO2 = 2.8V
IO (BOTH CHANNELS) = 0µA
+25°C
-40°C
FIGURE 7. VO1 DROPOUT VOLTAGE vs LOAD CURRENT FIGURE 8. GROUND CURRENT vs INPUT VOLTAGE
200 180 160 140 120 100
80 60
GROUND CURRENT (µA)
40 20
0
FIGURE 9. GROUND CURRENT vs LOAD
+85°C
+25°C
-40°C
V
= 3.8V
IN
VO1 = 3.3V VO2 = 2.8V
50 100 150 200 250 4000
LOAD CURRENT (mA)
350300
55
50
45
40
35
GROUND CURRENT (µA)
30
25
-25 5 35 8065 95 125
-10 20 50 110-40 TEMPERATURE (°C)
V
= 3.8V
IN
V
= 3.3V
O
= 0µA
I
LOAD
BOTH OUTPUTS ON
FIGURE 10. GROUND CURRENT vs TEMPERATURE
VO1 = 3.3V
2 = 2.8V
V
5
V
4
3
2
1
VOLTAGE (V)
0
0
1234567 10
VO1
IN
VO2
TIME (s)
O
1 = 300mA
I
L
2 = 300mA
I
L
89
FIGURE 11. POWER-UP/POWER-DOWN
VO2 (10mV/DIV)
3
2
1 (V)V
1
O
V
0
5
(V)
EN
0
100 200 300 400 500 600 700 8000
FIGURE 12. TURN-ON/TURN-OFF RESPONSE
6
TIME (µs)
VIN = 5.0V VO1 = 3.3V VO2 = 2.8V IL1 = 300mA IL2 = 300mA
-1, CL-2 = 1µF
C
L
C
= 0.01µF
BYP
900 1000
March 11, 2008
FN6438.1
Page 7
Typical Performance Curves (Continued)
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4.3V
3.6V
10mV/DIV
400µs/DIV
VO = 3.3V I
= 300mA
LOAD
C
= 1µF
LOAD
C
= 0.01µF
BYP
4.2V
3.5V
10mV/DIV
400µs/DIV
VO2 = 2.8V I
= 300mA
LOAD
= 1µF
C
LOAD
C
= 0.01µF
BYP
FIGURE 13. LINE TRANSIENT RESPONSE, 3.3V OUTPUT FIGURE 14. LINE TRANSIENT RESPONSE, 2.8V OUTPUT
300mA
100μA
VO (25mV/DIV)
V
O
V
IN
I
LOAD
100µs/DIV
FIGURE 15. LOAD TRANSIENT RESPONSE
= 1.8V
= 2.8V
100
90 80 70 60 50
PSRR (dB)
40 30 20 10
0
0.1 1k 10k 100k 1M FREQUENCY (Hz)
FIGURE 16. PSRR vs FREQUENCY
VIN = 3.6V V
= 1.8V
O
= 10mA
I
O
C
= 0.1µF
BYP
C
= 1µF
LOAD
1000
100
10
V
= 3.6V
IN
VO = 1.8V I
= 10mA
LOAD
C
BYP
C
IN
C
LOAD
= 0.1µF
= 1µF
= 1µF
FREQUENCY (Hz)
1
SPECTRAL NOISE DENSITY (nV/√Hz)
0.1 10 100 1k 10k 100k 1M
FIGURE 17. SPECTRAL NOISE DENSITY vs FREQUENCY
7
FN6438.1
March 11, 2008
Page 8
Pin Description
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PIN
PIN #
NAME TYPE DESCRIPTION
1 VIN Analog I/O Supply Voltage/LDO Input:
Connect a 1µF capacitor to GND.
2 EN1 Low Voltage Compatible
LDO-1 Enable.
CMOS Input
3 EN2 Low Voltage Compatible
LDO-2 Enable.
CMOS Input
4 CBYP Analog I/O Reference Bypass Capacitor Pin:
Optionally connect capacitor of value 0.01µF to 1µF between this pin and GND to tune in the desired noise and PSRR performance.
5, 7, 8 NC NC No Connection
6 GND Ground GND is the connection to system ground. Connect to PCB Ground plane. 9VO2
Analog I/O LDO-2 Output: Connect capacitor of value 1µF to 10µF to GND (1µF recommended).
10 VO1 Analog I/O LDO-1 Output: Connect capacitor of value 1µF to 10µF to GND (1µF recommended).
Typical Application
(2.3V to 6.5V)
V
IN
ENABLE 1
ENABLE 2
OFF
OFF
ON
ON
ISL9014A
1
VIN
2
EN1
3
EN2
4
CBYP
5
NC
C1 C2 C3 C4
C1, C3, C4: 1µF X5R CERAMIC CAPACITOR C2: 0.1µF X5R CERAMIC CAPACITOR
VO1 VO2
NC NC
GND
10 9
8 7
6
V V
OUT
OUT
1 2
8
FN6438.1
March 11, 2008
Page 9
Block Diagram
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IS1
1V
QEN1
VREF
TRIM
V
IN
LDO
ERROR
AMPLIFIER
VO1
VO1
LDO-1
LDO-2
IS1
IS2
EN1
EN2
UVLO
CONTROL
LOGIC
BANDGAP AND TEMPERATURE
SENSOR
CBYPGND
Functional Description
The ISL9014A contains all circuitry required to implement two high performance LDO’s. High performance is achieved through a circuit that delivers fast transient response to varying load conditions. In a quiescent condition, the ISL9014A adjusts its biasing to achieve the lowest standby current consumption.
The device also integrates current limit protection, smart thermal shutdown protection, staged turn-on and soft-start. Smart Thermal shutdown protects the device against overheating. Staged turn-on and soft-start minimize start-up input current surges without causing excessive device turn-on time.
Power Control
The ISL9014A has two separate enable pins (EN1 and EN2) to individually control power to each of the LDO outputs. When both EN1 and EN2 are low, the device is in shutdown mode. During this condition, all on-chip circuits are off, and the device draws minimum current, typically less than 0.1
µA.
QEN1
VO2
QEN2
VOLTAGE REFERENCE GENERATOR
~1.0V
1.00V
When one or both of the enable pins are asserted, the
device first polls the output of the UVLO detector to ensure
that VIN voltage is at least about 2.1V. Once verified, the
device initiates a start-up sequence. During the start-up
sequence, trim settings are first read and latched. Then,
sequentially, the bandgap, reference voltage and current
generation circuitry power up. Once the references are
stable, a fast-start circuit quickly charges the external
reference bypass capacitor (connected to the CBYP pin) to
the proper operating voltage. After the bypass capacitor has
been charged, the LDO’s power up.
If EN1 is brought high, and EN2 goes high before the VO1
output stabilizes, the ISL9014A delays the VO2 turn-on until
the VO1 output reaches its target level.
If EN2 is brought high, and EN1 goes high before VO2 starts
its output ramp, then VO1 turns on first and the ISL9014A
delays the VO2 turn-on until the VO1 output reaches its
target level.
9
FN6438.1
March 11, 2008
Page 10
If EN2 is brought high, and EN1 goes high after VO2 starts
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its output ramp, then the ISL9014A immediately starts to ramp up the VO1 output.
If both EN1 and EN2 are brought high at the same time, the VO1 output has priority, and is always powered up first.
During operation, whenever the VIN voltage drops below about 1.8V, the ISL9014A immediately disables both LDO outputs. When VIN rises back above 2.1V, the device re-initiates its start-up sequence and LDO operation will resume automatically.
Reference Generation
The reference generation circuitry includes a trimmed bandgap, a trimmed voltage reference divider, a trimmed current reference generator, and an RC noise filter. The filter includes the external capacitor connected to the CBYP pin. A 0.01
µF capacitor connected CBYP implements a 100Hz
lowpass filter, and is recommended for most high performance applications. For the lowest noise application, a
0.1
µF or greater CBYP capacitor should be used. This filters
the reference noise to below the 10Hz to 1kHz frequency band, which is crucial in many noise-sensitive applications.
The bandgap generates a zero temperature coefficient (TC) voltage for the reference divider. The reference divider provides the regulation reference and other voltage references required for current generation and over-temperature detection.
The current generator outputs references required for adaptive biasing as well as references for LDO output current limit and thermal shutdown determination.
LDO Regulation and Programmable Output Divider
The LDO Regulator is implemented with a high-gain
operational amplifier driving a PMOS pass transistor. The
design of the ISL9014A provides a regulator that has low
quiescent current, fast transient response, and overall
stability across all operating and load current conditions.
LDO stability is guaranteed for a 1
capacitor that has a toleranc e better than 2 0% and ESR less
than 200m
capacitor. Unless limited by the application, use of an output
capacitor value above 4.7
performance improvement is minimal.
Soft-start circuitry integrated into each LDO limits the initial
ramp-up rate to about 30
ISL9014A provides short-circuit protection by limiting the
output current to about 475mA.
Each LDO uses an independently trimmed 1V reference. An
internal resistor divider drops the LDO output voltage down
to 1V. This is compared to the 1V reference for regulation.
The resistor division ratio is programmed in the factory .
Ω. The design is performance-optimized for a 1µF
µF is not recommended as LDO
µs/V to minimize current surge. The
µF to 10µF output
Overheat Detection
The bandgap outputs a proportional-to-temperature current
that is indicative of the temperature of the silicon. This
current is compared with references to determine if the
device is in danger of damage due to overheating. When the
die temperature reaches about +145°C, one or both of the
LDO’s momentarily shut down until the die cools sufficiently.
In the overheat condition, only the LDO sourcing more than
50mA will be shut off. This does not affect the operation of
the other LDO. If both LDOs source more than 50mA and an
overheat condition occurs, both LDO outputs are disabled.
Once the die temperature falls back below about +110°C,
the disabled LDO(s) are re-enabled and soft-start
automatically takes place.
10
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Page 11
Dual Flat No-Lead Plastic Package (DFN)
www.BDTIC.com/Intersil
(DAT UM B )
6
INDEX AREA
(DATUM A)
NX (b)
5
SECTION "C-C"
6
INDEX AREA
SEATING
PLANE
NX L
8
A
C
D
TOP
VIEW
SIDE VIEW
D2
D2/2
12
N
N-1
e (Nd-1)Xe
REF .
BOTTOM VIEW
(A1)
2X
A3
E2/2
NX b
5
C
L
e
CC
FOR ODD TERMINAL/SIDE
87
0.10
ABC0.10
2X
0.10
E
//
A
NX k
E2
M
9
TERMINAL TIP
CB
0.10
0.08
L
L10.3x3C
10 LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE
MILLIMETERS
SYMBOL
A 0.85 0.90 0.95 ­A1 - - 0.05 ­A3 0.20 REF -
b 0.20 0.25 0.30 5, 8
D 3.00 BSC ­D2 2.33 2.38 2.43 7, 8
C
E 3.00 BSC ­E2 1.59 1.64 1.69 7, 8
C
e 0.50 BSC -
k0.20- - ­L 0.35 0.40 0.45 8 N102
Nd 5 3
NOTES:
1. Dimensioning and tolerancing conform to ASME Y14.5-1994.
2. N is the number of terminals.
3. Nd refers to the number of terminals on D.
4. All dimensions are in millimeters. Angles are in degrees.
5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip.
6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identi fier may be
BAC
either a mold or mark feature.
7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance.
8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389.
9. COMPLIANT TO JEDEC MO-229-WEED-3 except for dimensions E2 & D2.
NOTESMIN NOMINAL MAX
Rev. 1 4/06
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implic atio n or other wise u nde r any p a tent or patent rights of Intersil or its subs idi aries.
For information regarding Intersil Corporation and its products, see www.intersil.com
11
FN6438.1
March 11, 2008
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