ISL9021A
5
FN7845.3
December 20, 2012
Absolute Maximum Ratings Thermal Information
Supply Voltage (VIN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.5V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V
Recommended Operating Conditions
Ambient Temperature Range (T
A
) . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage (V
IN
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 to 5.5V
ESD Rating
Human Body Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000V
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2200V
Latch-Up Passed at +85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Thermal Resistance (Typical) θ
JA
(°C/W) θ
JC
(°C/W)
4 Ball WLCSP (Note 5) . . . . . . . . . . . . . . . . . 135.64 N/A
6 Lead µTDFN (Notes 6, 7) . . . . . . . . . . . . . 230 93
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
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:
5. θ
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
.
6. θ
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
7. For θ
JC
, the “case temp” location is taken at the package top center.
Electrical Specifications T
A
= -40°C to +85°C; V
IN
= (V
O
+ 0.5V) to 5.5V with a minimum V
IN
of 1.5V; C
IN
= 1µF; C
O
= 1µF. Boldface
limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL TEST CONDITIONS
MIN
(Note 10) TYP
MAX
(Note 10) UNIT
DC CHARACTERISTICS
Supply Voltage V
IN
1.5 5.5 V
V
IN
Undervoltage Lockout
Threshold
V
UVLO+
V
IN
Rising 1.425 1.5 V
V
UVLO-
V
IN
Falling 1.3 1.375 V
Ground Current I
DD
Output Enabled; I
O
= 0; V
IN
= 1.5V to 5.5V 35 50 µA
Shutdown Current I
DDS
V
IN
= 5.5V, EN = Low, I
O
= 0 0.1 1.0 µA
Output Voltage Accuracy V
IN
= V
O
+ 0.5V to 5.5V, I
O
= 1mA to 250mA, T
J
= +25°C-0.8 +0.8%
V
IN
= V
O
+ 0.5V to 5.5V, I
O
= 1mA to 250mA, T
J
= -40°C to +125°C -1.8 +1.8 %
Maximum Output Current I
MAX
Continuous 250 mA
Internal Current Limit I
LIM
260 mA
Dropout Voltage (Notes 8, 9) V
DO
I
O
= 250mA; V
O
> 1.8V 150 250 mV
Thermal Shutdown Temperature T
SD
160
°C
Thermal Shutdown Hysteresis 20
°C
AC CHARACTERISTICS
Ripple Rejection (Note 8) V
IN
= 4.5V, V
O
= 3.3V @ 1kHz 60 dB
V
IN
= 4.5V, V
O
= 3.3V @ 10kHz 75 dB
V
IN
= 4.5V, V
O
= 3.3V @ 1MHz 50 dB
Output Noise Voltage (Note 8) V
IN
= 4.2V, T
A
= +25°C, BW = 10Hz to 100kHz, I
O
= 10mA 8.5*V
O
µV
RMS
DEVICE START-UP CHARACTERISTICS
Device Enable Time t
EN
Time from assertion of the EN pin to when the output voltage
reaches 95% of the V
O
(nom)
250 600 µs
LDO Soft-start Ramp Rate t
SSR
Slope of linear portion of LDO output voltage ramp during start-up 30 60 µs/V
