ISL9021
S
DESIGN
O R NEW
EN DED F
T PART
RECOMM D REPLACEMEN
NOT
ENDE
RECOMM
ISL9021A
DATASHEET
FN6867
Rev 2.00
January 14, 2010
250mA Single LDO with Low I
Q
, Low Noise and High PSRR LDO
The ISL9021 is a single LDO providing high performance
low input voltage, high PSRR. It delivers guaranteed
continuous 250mA load current and is stable with 1µF to
4.7µF of output capacitance (±30%) with an ESR range of
5m to 400m.
The input voltage range for the ISL9021 is between 1.5V to
5.5V and the output voltage comes in many fixed voltage
options with ±1.8% accuracy over temperature, line and load
ranges. Other output voltage within the range of 0.9V to 3.3V
may be available upon request. The ISL9021 has typical
PSRR of 75dB @ 10kHz and 50dB @ 1MHz.
The reverse current protection feature prevents current from
flowing back to the power source when the output voltage is
pulled higher than the input.
The ISL9021 is offered in tiny 4-bump 1.155mmx0.975mm
WLCSP and 1.6mmx1.6mm 6 Ld µTDFN packages.
Features
• High Performance LDO with 250mA guaranteed
continuous output current
• Input Voltage Range: 1.5V to 5.5V
• Output Voltage Range: 0.9V to 3.3V
• High PSRR: 75dB @ 10kHz, 50dB @ 1MHz
• Low Quiescent Current: 35µA
• Dropout Voltage: <150mV @ 250mA
• Stable with 1µF to 4.7µF Output Capacitance (±30%) with
an ESR range of 5m to 400m
• ±1.8% Output Accuracy Over-Temperature/Load/Line
• Soft-start Limits Input Current Surge During Enable
• Current Limit and Overheat Protection
• -40°C to +85°C Operating Temperature Range
Pinouts
ISL9021
(6 LD 1.6x1.6 µTDFN)
TOP VIEW
VIN 1
NC 2
EN 3
6
5
• Available in 1.155mmx0.975mm 4-bump WLCSP
Package and 1.6mmx1.6mm 6 Ld µTDFN
• Pb-free (RoHS compliant)
VO
NC
Applications
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Handheld Devices including Medical Handhelds
4 GND
ISL9021
(4 BALL 1.155x0.975 WLCSP)
TOP VIEW
GND
EN
A2
A1
B2
B1
VOUT
VIN
FN6867 Rev 2.00
January 14, 2010
Page 1 of 10
ISL9021
Ordering Information
PART NUMBER
ISL9021II1Z-T (Notes 1, 3)
ISL9021II2Z-T (Notes 1, 3)
ISL9021II3Z-T (Notes 1, 3)
ISL9021II4Z-T (Notes 1, 3)
ISL9021IIBZ-T (Notes 1, 3)
ISL9021IICZ-T (Notes 1, 3)
ISL9021IIFZ-T (Notes 1, 3)
ISL9021IIGZ-T (Notes 1, 3)
ISL9021IIJZ-T (Notes 1, 3)
ISL9021IIKZ-T (Notes 1, 3)
ISL9021IIMZ-T (Notes 1, 3)
ISL9021IINZ-T (Notes 1, 3)
ISL9021IIPZ-T (Notes 1, 3)
ISL9021IIRZ-T (Notes 1, 3)
ISL9021IISZ-T (Notes 1, 3)
ISL9021IITZ-T (Notes 1, 3)
ISL9021IIWZ-T (Notes 1, 3)
ISL9021IIYZ-T (Notes 1, 3)
ISL9021IRU1Z-T (Notes 1, 4)
ISL9021IRU2Z-T (Notes 1, 4)
ISL9021IRU3Z-T (Notes 1, 4)
ISL9021IRU4Z-T (Notes 1, 4)
ISL9021IRUBZ-T (Notes 1, 4)
ISL9021IRUCZ-T (Notes 1, 4)
ISL9021IRUFZ-T (Notes 1, 4)
ISL9021IRUGZ-T (Notes 1, 4)
ISL9021IRUJZ-T (Notes 1, 4)
ISL9021IRUKZ-T (Notes 1, 4)
ISL9021IRUMZ-T (Notes 1, 4)
ISL9021IRUNZ-T (Notes 1, 4)
ISL9021IRUPZ-T (Notes 1, 4)
ISL9021IRURZ-T (Notes 1, 4)
ISL9021IRUSZ-T (Notes 1, 4)
ISL9021IRUTZ-T (Notes 1, 4)
ISL9021IRUWZ-T (Notes 1, 4)
ISL9021IRUYZ-T (Notes 1, 4)
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. For other output voltages, contact Intersil Marketing.
3. These Intersil Pb-free WLCSP and BGA packaged products employ special Pb-free material sets; molding compounds/die attach materials and
SnAgCu - e1 solder ball terminals, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free
WLCSP and BGA packaged products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
4. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu
plate - e4 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.
PART
MARKING
0211
0212
0213
0214
021B
021C
021F
021G
021J
021K
021M
021N
021P
021R
021S
021T
021W
021Y
S1
S9
S3
S0
S4
S6
T0
T2
T3
T4
T5
R8
S7
T1
S5
S8
S2
R9
V
O
Voltage
(Note 2)
1.1
2.1
1.3
1.0
1.5
1.8
2.5
2.7
2.8
2.85
3.0
3.3
1.85
2.6
1.6
1.9
1.2
0.9
1.1
2.1
1.3
1.0
1.5
1.8
2.5
2.7
2.8
2.85
3.0
3.3
1.85
2.6
1.6
1.9
1.2
0.9
TEMP RANGE
(°C)
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
PACKAGE
Tape & Reel
(Pb-free)
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
4 Ball WLCSP
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
6 Ld µTDFN
PACKAGE
DWG. #
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
W2x2.4
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
L6.1.6x1.6
FN6867 Rev 2.00
January 14, 2010
Page 2 of 10
ISL9021
Absolute Maximum Ratings
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.5V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V
Thermal Information
Thermal Resistance (Typical, Note 5)
JA
(°C/W)
4 Ball WLCSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
135.64
6 Lead µTDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
140
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
Recommended Operating Conditions
Ambient Temperature Range (T
A
) . . . . . . . . . . . . . . .-40°C to +85°C
Supply Voltage (V
IN
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 to 5.5V
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.
NOTE:
5.
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
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; Parameters
with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits
established by characterization and are not production tested.
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PARAMETER
DC CHARACTERISTICS
Supply Voltage
V
IN
Undervoltage Lockout
Threshold
Ground Current
Shutdown Current
Output Voltage Accuracy
V
IN
V
UVLO+
V
UVLO-
I
DD
I
DDS
V
IN
Rising
V
IN
Falling
Output Enabled; I
O
= 0; V
IN
= 1.5V to 5.5V
V
IN
= 5.5V, EN = Low, I
O
= 0
V
IN
= V
O
+ 0.5V to 5.5V, I
O
= 1mA to 150mA, T
J
= +25°C
I
MAX
I
LIM
V
DO
T
SD
I
O
= 250mA; V
O
> 1.8V
Continuous
1.5
1.425
1.3
1.375
35
0.1
-0.8
5.5
1.5
V
V
V
50
1.0
+0.8
+1.8
µA
µA
%
V
IN
= V
O
+ 0.5V to 5.5V, I
O
= 1mA to 150mA, T
J
= -40°C to +125°C -1.8
Maximum Output Current
Internal Current Limit
Dropout Voltage (Notes 6, 7)
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
AC CHARACTERISTICS
Ripple Rejection (Note 6)
V
IN
= 4.5V, V
O
= 3.3V @ 1kHz
V
IN
= 4.5V, V
O
= 3.3V @ 10kHz
V
IN
= 4.5V, V
O
= 3.3V @ 1MHz
Output Noise Voltage (Note 6)
DEVICE START-UP CHARACTERISTICS
Device Enable Time
LDO Soft-start Ramp Rate
EN LOGIC CHARACTERISTICS
Input Low Voltage
Input High Voltage
Input Leakage Current
NOTES:
6. Limits established by characterization and are not production tested.
7. Dropout voltage is measured as V
IN
- V
O
, when V
O
is 4% lower than the value of V
O
; when V
IN
= V
O
+ 0.5V.
V
IL
V
IH
I
IL,
I
IH
1.1
t
EN
t
SSR
Time from assertion of the EN pin to when the output voltage
reaches 95% of the V
O
(nom)
Slope of linear portion of LDO output voltage ramp during start-up
250
30
V
IN
= 4.2V, T
A
= +25°C, BW = 10Hz to 100kHz, I
O
= 10mA
60
75
50
8.5*V
O
250
260
150
160
20
mA
mA
250
mV
°C
°C
dB
dB
dB
µV
RMS
600
60
µs
µs/V
0.4
V
V
0.1
µA
FN6867 Rev 2.00
January 14, 2010
Page 3 of 10
ISL9021
Typical Operating Performance
45
QUIESCENT CURRENT (µA)
40
35
30
25
20
15
10
5
0
1.5
2.5
3.5
4.5
INPUT VOLTAGE (V)
5.5
T = -40°C
T = 0°C
T = -25°C
T = ROOM TEMP
QUIESCENT CURRENT (µA)
T = +45°C
T = +85°C
45
40
35
30
25
20
15
10
5
0
1.5
2.5
3.5
4.5
INPUT VOLTAGE (V)
5.5
T = -40°C
T = -25°C
T = 0°C
T = ROOM TEMP
T = +45°C
T = +85°C
FIGURE 1. QUIESCENT CURRENT vs INPUT VOLTAGE
(V
OUT
= 0.9V)
FIGURE 2. QUIESCENT CURRENT vs INPUT VOLTAGE
(V
OUT
= 1.85V)
50
QUIESCENT CURRENT (µA)
40
30
T = ROOM TEMP
T = +45°C
T = +85°C
1.95
1.90
1.85
Vo (V)
+85°C
+25°C
20
T = -40°C
10
0
-10
3.5
4.0
T = 0°C
T = -25°C
1.80
-40°C
1.75
1.70
1.65
4.5
5.0
INPUT VOLTAGE (V)
5.5
6.0
1.60
0
50
100
150
Io (mA)
200
250
300
FIGURE 3. QUIESCENT CURRENT vs INPUT VOLTAGE
(V
OUT
= 3.3V)
FIGURE 4. LOAD REGULATION vs TEMPERATURE
(V
OUT
= 1.85V)
2.00
1.95
1.90
1.85
Vo (V)
1.75
1.70
1.65
1.60
1.55
1.50
2.5
3.5
4.5
V
IN
(V)
5.5
6.5
+85°C
-40°C
Vo (V)
1.80
+25°C
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
0
50
100
150
Io (mA)
200
250
300
-40°C
+25°C
+85°C
FIGURE 5. LINE REGULATION vs TEMPERATURE
(V
OUT
= 1.85V)
FIGURE 6. LOAD REGULATION vs TEMPERATURE
(V
OUT
= 3.3V)
FN6867 Rev 2.00
January 14, 2010
Page 4 of 10
ISL9021
Typical Operating Performance
(Continued)
3.50
3.45
3.40
3.35
Vo (V)
3.30
3.25
3.20
3.15
3.10
3.05
3.00
3.5
4.0
4.5
V
IN
(V)
5.0
5.5
6.0
-40°C
+25°C
+85°C
Vo (V)
1.05
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0
50
100
150
Io (mA)
200
250
300
-40°C
+25°C
+85°C
FIGURE 7. LINE REGULATION vs TEMPERATURE
(V
OUT
= 3.3V)
FIGURE 8. LOAD REGULATION vs TEMPERATURE
(V
OUT
= 0.9V)
V
IN
= 2.7V
1.00
0.95
0.90
Vo (V)
0.85
0.80
0.75
0.70
3.0
3.5
4.0
4.5
V
IN
(V)
5.0
5.5
6.0
-40°C
V
OUT
+85°C
V
OUT
= 1.85V
+25°C
C
OUT
= 1µF
I
OUT
I
OUT
= 1mA TO 250mA
FIGURE 9. LINE REGULATION vs TEMPERATURE
(V
OUT
= 0.9V)
FIGURE 10. LOAD TRANSIENT RESPONSE
V
OUT
= 1.85V
V
OUT
V
IN
= 2.7V
C
OUT
= 4.7µF
I
OUT
I
OUT
= 1mA TO 250mA
FIGURE 11. LOAD TRANSIENT RESPONSE
FIGURE 12. ENABLE FUNCTION (V
IN
= 3.6V, V
OUT
= 1.85V,
C
OUT
1µF)
FN6867 Rev 2.00
January 14, 2010
Page 5 of 10
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