intersil ISL9021 DATA SHEET

ISL9021

Datasheet January 14, 2010

250mA Single LDO with Low IQ, 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 5mΩ to 400mΩ.

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.

Pinouts

ISL9021

(6 LD 1.6x1.6 µTDFN)

TOP VIEW

FN6867.2

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 5mΩ to 400mΩ

• ±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 Temp e r at ure Range

• Available in 1.155mmx0.975mm 4-bump WLCSP Package and 1.6mmx1.6mm 6 Ld µTDFN

• Pb-free (RoHS compliant)

Applications

• PDAs, Cell Phones and Smart Phones

VOUT

VIN

GND

VIN

ISL9021

(4 BALL 1.155x0.975 WLCSP)

TOP VIEW

GND

A1 B1

• Portable Instruments, MP3 Players

• Handheld Devices including Medical Handhelds

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.

ISL9021

Ordering Information

PACKAGE

PART NUMBER PART

MARKING

ISL9021II1Z-T (Notes 1, 3) 0211 1.1 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021II2Z-T (Notes 1, 3) 0212 2.1 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021II3Z-T (Notes 1, 3) 0213 1.3 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021II4Z-T (Notes 1, 3) 0214 1.0 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIBZ-T (Notes 1, 3) 021B 1.5 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IICZ-T (Notes 1, 3) 021C 1.8 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIFZ-T (Notes 1, 3) 021F 2.5 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIGZ-T (Notes 1, 3) 021G 2.7 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIJZ-T (Notes 1, 3) 021J 2.8 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIKZ-T (Notes 1, 3) 021K 2.85 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIMZ-T (Notes 1, 3) 021M 3.0 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IINZ-T (Notes 1, 3) 021N 3.3 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIPZ-T (Notes 1, 3) 021P 1.85 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIRZ-T (Notes 1, 3) 021R 2.6 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IISZ-T (Notes 1, 3) 021S 1.6 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IITZ-T (Notes 1, 3) 021T 1.9 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIWZ-T (Notes 1, 3) 021W 1.2 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IIYZ-T (Notes 1, 3) 021Y 0.9 -40 to +85 4 Ball WLCSP W2x2.4 ISL9021IRU1Z-T (Notes 1, 4) S1 1.1 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRU2Z-T (Notes 1, 4) S9 2.1 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRU3Z-T (Notes 1, 4) S3 1.3 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRU4Z-T (Notes 1, 4) S0 1.0 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUBZ-T (Notes 1, 4) S4 1.5 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUCZ-T (Notes 1, 4) S6 1.8 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUFZ-T (Notes 1, 4) T0 2.5 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUGZ-T (Notes 1, 4) T2 2.7 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUJZ-T (Notes 1, 4) T3 2.8 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUKZ-T (Notes 1, 4) T4 2.85 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUMZ-T (Notes 1, 4) T5 3.0 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUNZ-T (Notes 1, 4) R8 3.3 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUPZ-T (Notes 1, 4) S7 1.85 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRURZ-T (Notes 1, 4) T1 2.6 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUSZ-T (Notes 1, 4) S5 1.6 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUTZ-T (Notes 1, 4) S8 1.9 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUWZ-T (Notes 1, 4) S2 1.2 -40 to +85 6 Ld µTDFN L6.1.6x1.6 ISL9021IRUYZ-T (Notes 1, 4) R9 0.9 -40 to +85 6 Ld µTDFN L6.1.6x1.6

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.

VO Voltage

(Note 2)

TEMP RANGE

(°C)

Tape & Reel

(Pb-free)

PACKAGE

DWG. #

FN6867.2

January 14, 2010

ISL9021

Absolute Maximum Ratings Thermal Information

Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.5V

All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V

Thermal Resistance (Typical, Note 5) θ

4 Ball WLCSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135.64

6 Lead µTDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Recommended Operating Conditions

Ambient Temperature Range (TA) . . . . . . . . . . . . . . .-40°C to +85°C

Supply Voltage (V

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 to 5.5V

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.

NOTE:

is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

5. θ

Tech Brief TB379.

(°C/W)

Electrical Specifications T

= -40°C to +85°C; V

with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits

= (VO + 0.5V) to 5.5V with a minimum VIN of 1.5V; C

= 1µF; CO = 1µF; Parameters

established by characterization and are not production tested.

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

DC CHARACTERISTICS

Supply Voltage V

Undervoltage Lockout

Threshold Ground Current I

Shutdown Current I

UVLO+VIN

UVLO-VIN

DDS

Output Voltage Accuracy V

Maximum Output Current I Internal Current Limit I Dropout Voltage (Notes 6, 7) V Thermal Shutdown Temperature T

MAX

LIM

DOIO SD

Rising 1.425 1.5 V

Falling 1.3 1.375 V Output Enabled; IO = 0; V V

= 5.5V, EN = Low, IO = 0 0.1 1.0 µA

= VO + 0.5V to 5.5V, IO = 1mA to 150mA, TJ = +25°C -0.8 +0.8 %

= VO + 0.5V to 5.5V , IO = 1mA to 150mA, TJ = -40°C to +125°C -1.8 +1.8

= 1.5V to 5.5V 35 50 µA

Continuous 250 mA 260 mA

= 250mA; VO > 1.8V 150 250 mV

1.5 5.5 V

160 °C

Thermal Shutdown Hysteresis 20 °C

AC CHARACTERISTICS

Ripple Rejection (Note 6) V

Output Noise Voltage (Note 6) V

= 4.5V, VO = 3.3V @ 1kHz 60 dB

= 4.5V, VO = 3.3V @ 10kHz 75 dB

= 4.5V, VO = 3.3V @ 1MHz 50 dB

= 4.2V, TA = +25°C, BW = 10Hz to 100kHz, IO = 10mA 8.5*V

µV

DEVICE START-UP CHARACTERISTICS

Device Enable Time t

LDO Soft-start Ramp Rate t

SSR

Time from assertion of the EN pin to when the output voltage

reaches 95% of the V

(nom)

250 600 µs

Slope of linear portion of LDO output voltage ramp during start-up 30 60 µs/V

EN LOGIC CHARACTERISTICS

Input Low Voltage V Input High Voltage V Input Leakage Current I

IL, IIH

1.1 V

0.4 V

0.1 µA

NOTES:

6. Limits established by characterization and are not production tested.

7. Dropout voltage is measured as V

- VO, when VO is 4% lower than the value of VO; when VIN = VO + 0.5V.

RMS

FN6867.2

January 14, 2010

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