ISL6416
NOT RECOMMENDED FOR NEW DESIGNS
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
DATASHEET
FN9193
Rev 0.00
Nov 3, 2004
Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit
The ISL6416 is an ultra low noise triple output LDO regulator
with microprocessor reset circuit and is optimized for
powering wireless chip sets. The IC accepts an input voltage
range of 3.0V to 3.6V and provides three regulated output
voltages: 1.8V (LDO1), 2.8V (LDO2), and another ultra-clean
2.8V (LDO3). On chip logic provides sequencing between
LDO1 and LDO2 for the BBP/MAC and the I/O supply
voltage outputs. LDO3 features ultra low noise that does not
exceed 30µV
RMS
(typical) to aid VCO stability. High
integration makes the ISL6416 an ideal choice to power
many of today’s small form factor industry standard wireless
cards such as PCMCIA, mini-PCI and Cardbus-32.
The ISL6416 uses an internal PMOS transistor as the pass
device. The ISL6416 also integrates a reset function, which
eliminates the need for the additional reset IC required in
WLAN applications. The IC asserts a RESET signal
whenever the VIN supply voltage drops below a preset
threshold, keeping it asserted for at least 25ms after Vin has
risen above the reset threshold. FAULT indicates the loss of
regulation on LDO1.
Features
• Three LDOs and a RESET circuit
• High Output Current
- LDO1, 1.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330mA
- LDO2, 2.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225mA
- LDO3, 2.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125mA
• Low Output Voltage Noise
- <30µV
RMS
(typical) for LDO3 (VCO Supply)
• Stable with Small Ceramic Output Capacitors
• Extensive Protection and Monitoring Features
- Overcurrent protection
- Short circuit protection
- Thermal shutdown
- FAULT indicator
• Logic-Controlled Shutdown Pin
• Integrated Microprocessor Reset Circuit
- Programmable Reset Delay
• Proven Reference Design for a Total WLAN System
Solution
• Pb-Free Available (RoHS Compliant)
Ordering Information
PART NUMBER
ISL6416IA
ISL6416IAZ (Note 1)
NOTES:
1. Tape and Reel available. Add “-T” suffix for Tape and Reel
Packing Option.
2. Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin
plate termination finish, which are 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-020C.
TEMP.
RANGE (°C)
-40 to +85
-40 to +85
PACKAGE
16 Ld QSOP
16 Ld QSOP
(Pb-free)
PKG.
DWG. #
M16.15A
M16.15A
Applications
• WLAN Cards
- PCMCIA, Cardbus32, MiniPCI Cards
- Compact Flash Cards
• Hand-Held Instruments
FN9193 Rev 0.00
Nov 3, 2004
Page 1 of 11
ISL6416
Absolute Maximum Ratings
V
IN
, SHDN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V
RESET, CC, FAULT to GND . . . . . . . . . . . . . . . . . . . . -0.3V to 7.0V
Output Current (Continuous)
LDO1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330mA
LDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225mA
LDO3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125mA
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
QSOP Package (Note 3) . . . . . . . . . . . . . . . . . . .
105
Maximum Junction Temperature (Plastic Package) . -55°C to 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
Operating Temperature Range . . . . . . . . . . . . . . . . . . -40°C to 85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3.
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
Electrical Specifications
PARAMETER
GENERAL SPECIFICATIONS
V
IN
Voltage Range
Operating Supply Current
Shutdown Supply Current
SHDN Input Threshold
V
IN
= +3.3V, Compensation Capacitor = 33nF, T
A
= 25°C, unless otherwise noted.
TEST CONDITIONS
MIN
TYP
MAX
UNITS
3.0
IOUT = 0mA
SHDN = GND
VIH, VIN = 3V to 3.6V
VIL, VIN = 3V to 3.6V
-
-
2.0
-
145
-
C
OUT
= 10F, V
OUT
= 90% of final
value
Rising 75mV Hysteresis
-
2.4
3.3
830
5
-
-
150
20
120
2.45
3.6
-
10
-
0.4
160
-
-
2.6
V
A
A
V
V
°C
°C
s
V
Thermal Shutdown Temperature (Note 6)
Thermal Shutdown Hysteresis (Note 6)
Start-up Time (Note 6)
Input Undervoltage Lockout (Note 6)
LDO1 SPECIFICATIONS
Output Voltage (V
OUT1
)
Output Voltage Initial Accuracy
Line Regulation
Load Regulation
Maximum Output Current (I
OUT1
)
Output Current Limit
Output Voltage Noise (Note 6)
LDO2 SPECIFICATIONS
Output Voltage (V
OUT2
)
Output Voltage Accuracy
Maximum Output Current (I
OUT2
)
Output Current Limit
Dropout Voltage (Note 4)
Line Regulation
Load Regulation
I
OUT
= 225mA
V
IN
= 3.0V to 3.6V, I
OUT
= 10mA
I
OUT
= 10mA to 225mA
I
OUT
= 10mA, T
A
= -40°C to 85°C
VIN = 3.3V
10Hz < f < 100kHz, C
OUT
= 4.7F,
I
OUT
= 50mA
I
OUT
= 10mA, T
A
= -40°C to 85°C
V
IN
= 3.0V to 3.6V, I
OUT
= 10mA
I
OUT
= 10mA to 330mA
VIN = 3.3V
-
-2.0
-0.15
-1.5
330
500
-
1.8
-
0.0
-
-
-
115
-
2.0
0.15
1.5
-
-
-
V
%
%/V
%
mA
mA
V
RMS
-
-2.0
225
330
-
-0.15
-1.0
2.8
-
-
-
75
0.0
0.2
-
2.0
-
-
200
0.15
1.0
V
%
mA
mA
mV
%/V
%
FN9193 Rev 0.00
Nov 3, 2004
Page 4 of 11
ISL6416
Electrical Specifications
PARAMETER
Output Voltage Noise (Note 6)
V
IN
= +3.3V, Compensation Capacitor = 33nF, T
A
= 25°C, unless otherwise noted.
(Continued)
TEST CONDITIONS
10Hz < f < 100kHz, I
OUT
= 10mA
C
OUT
= 2.2F
C
OUT
= 10F
LDO3 SPECIFICATIONS
Output Voltage (V
OUT3
)
Output Voltage Accuracy
Maximum Output Current (I
OUT3
)
Output Current Limit
Dropout Voltage (Note 4)
Line Regulation
Load Regulation
Output Voltage Noise (Note 6)
I
OUT
= 125mA
V
IN
= 3.0V to 3.6V, I
OUT
= 10mA
I
OUT
= 10mA to 125mA
10Hz < f < 100kHz, I
OUT
= 10mA
C
OUT
= 2.2F
C
OUT
= 10F
RESET BLOCK SPECIFICATIONS
Reset Threshold
Reset Threshold Hysteresis (Note 5)
V
IN
to Reset Delay (Note 5)
RESET Active Timeout Period (Note 5)
FAULT
Rising Threshold
Falling Threshold
% of V
OUT
% of V
OUT
+5.5
-10.5
+8.0
-8.0
+10.5
-5.5
%
%
VCC = V
TH
to V
TH
- 100mV
CT = 0.01µF
2.564
6.3
-
50
2.630
-
20
-
2.66
-
-
-
V
mV
s
ms
-
-
30
20
-
-
V
RMS
V
RMS
I
OUT
= 10mA, T
A
= -40°C to 85°C
VIN = 3.3V
-
-2.0
125
300
-
-0.15
-1.0
2.8
-
-
-
65
0.0
0.2
-
2.0
-
-
200
0.15
1.0
V
%
mA
mA
mV
%/V
%
-
-
65
60
-
-
V
RMS
V
RMS
MIN
TYP
MAX
UNITS
4. The dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 50mV below the value of V
OUT
for V
IN
= V
OUT
+ 0.5V.
5. The RESET time is linear with CT at a slope of ~5ms/nF. Thus, at 10nF (0.01F) the RESET time is 50ms.
6. Guaranteed by design, not production tested.
Typical Performance Curves
The test conditions for the Typical Operating Performance are: V
IN
= 3.3V, T
A
= 25°C,
Unless Otherwise Noted
SHDN
1V/DIV
VOUT2
1V/DIV
SHDN
1V/DIV
VOUT3
1V/DIV
VOUT2
1V/DIV
VOUT3
1V/DIV
VOUT1
1V/DIV
VOUT1
1V/DIV
100µs/DIV
100µs/DIV
FIGURE 1. START-UP SEQUENCE
FIGURE 2. SHUTDOWN SEQUENCE
FN9193 Rev 0.00
Nov 3, 2004
Page 5 of 11
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