Datasheet

ManualsBrandsFAIRCHILD SEMICONDUCTOR ManualsPMICsPMIC - LDO voltage regulator Positive, fixed SOT 23 5

www.fairchildsemi.com

REV. 1.0.4 3/15/04

Features

• Fixed 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 3.3V, 3.5V, 3.6V,

3.8V and Adjustable Output

•Power Good Indicator with Open Drain Output

• 180mA Output Current

• 100µA Ground Current

•C

bypass

for Low Noise Operation

•Fast Enable for CDMA Applications

• High Ripple Rejection

• Current Limit

• Thermal Shutdown

• Excellent Line and Load Regulation

• Requires Only 1µF Output Capacitor

• Stable with 0 to 300m

Ω

ESR

• TTL-level Compatible Enable Input

• Active Output Discharge

Applications

• Processor Power-up sequencing

•PDAs, Cell Phones

• Portable Electronic Equipment

• PCMCIA Vcc and Vpp regulation/switching

General Description

The FAN2558/9 low voltage CMOS LDOs feature ﬁxed or

adjustable output voltage, 180mA load current, delayed

power good output (open drain) and 1% output accuracy

with excellent line and load regulation. An external bypass

capacitor provides ultra-low noise operation.

The FAN2558/9 low voltage LDOs incorporate both thermal

shutdown and short circuit protection. Output is stable with a

1µF, low ESR capacitor. The FAN2558/9 family is available

in 5-Lead SOT-23, 6-Lead SOT-23 and 2x2mm MLP-6

packages.

FAN2558:

Fixed Output LDO with Power Good output

FAN2558ADJ:

Adjustable Output LDO with Power Good

output

FAN2559:

Fixed Output LDO with Power Good output,

Low Noise

Available standard output voltages are 1.0, 1.2V, 1.3V, 1.5V,

1.8V, 2.5V, 3.3V, 3.5V, 3.6V, and 3.8V. Custom output volt-

age options are also available.

FAN2558/FAN2559

180mA Low Voltage CMOS LDO

Typical Application

OUT

SHDN

CAP+

CAP-

GND

ADJ

OUT

FAN2558ADJ

SHDN

CAP+

CAP-

GND

OUT

FAN2558

SHDN

CAP+

CAP-

GND

OUT

BYP

FAN2559

47KΩ47KΩ 47KΩ

Summary of content (15 pages)

PAGE 1
www.fairchildsemi.com FAN2558/FAN2559 180mA Low Voltage CMOS LDO Features General Description • Fixed 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 3.3V, 3.5V, 3.6V, 3.
PAGE 2
FAN2558/FAN2559 PRODUCT SPECIFICATIONS Pin Assignments TOP-VIEW VIN 1 VIN 1 5 VOUT GND 2 EN 3 GND 2 5 ADJ/BYP EN 3 4 PG 4 PG FAN2558 5-Lead SOT-23 PACKAGE VOUT NC/ADJ/BYP PG 6 VOUT FAN2558ADJ/FAN2559 6-Lead SOT-23 PACKAGE 1 6 2 5 3 4 VIN GND EN FAN2558/FAN2558ADJ/FAN2559 2x2mm MLP-6 PACKAGE Pin Name Pin no. FAN2558 FAN2558ADJ FAN2559 5SOT-23 2x2mm MLP-6 6SOT-23 2x2mm MLP-6 6SOT-23 2x2mm MLP-6 1 VIN VOUT VIN VOUT VIN VOUT 2 GND. NC GND. ADJ GND.
PAGE 3
PRODUCT SPECIFICATIONS FAN2558/FAN2559 Absolute Maximum Ratings Parameter Min. Max. 6 V Voltage on any other pin to GND -0.3 VIN + 0.3 V Junction Temperature (TJ) -55 150 °C Storage Temperature -65 150 °C 300 °C Internally Limited W VIN to GND Lead Soldering Temperature, 10 seconds Power Dissipation (PD) Electrostatic Discharge (ESD) Protection (Note1) HBM 4 CDM 1 Units kV Recommended Operating Conditions Parameter Max. Units Supply Voltage Range, VIN for VOUT < 2.0V Min.
PAGE 4
FAN2558/FAN2559 PRODUCT SPECIFICATIONS Electrical Characteristics VIN = VIN min (note 5) to 5.5V, VEN = VIN, ILOAD = 100µA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at 25°C. Symbol VOUT VOUT(ADJ) Parameter Conditions Min. Typ. Max. Units Output Voltage Accuracy (Note 3) ILOAD = 100µA -2 1 2 % Output Voltage Range (Adjustable) ILOAD = 100µA 1 VIN V VIN min < VIN < 5.5V -0.3 0.
PAGE 5
PRODUCT SPECIFICATIONS FAN2558/FAN2559 DC Electrical Characteristics (Continued) VIN = VIN min (note 5) to 5.5V, VEN = VIN, ILOAD = 100µA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at 25°C. Symbol Parameter Conditions PSRR Power Supply Rejection Ratio DC to 100kHz COUT =1µF CBYPASS= 10nF ILOAD = 0 to 150mA VOUT ≤ 1.8V 50 dB Output Noise BW: 300Hz to 50kHz COUT =1µF CBYPASS= 10nF ILOAD = 0 to 150mA 30 µVRMS eN REV. 1.0.4 3/15/04 Min. Typ. Max.
PAGE 6
FAN2558/FAN2559 Functional Description Utilizing BiCMOS technology, the FAN2525/FAN2559 product family is optimized for use in compact battery powered systems. These LDOs offer a unique combination of high ripple rejection, low noise, low power consumption, high tolerance for a variety of output capacitors, and less than 1µA “OFF” current. In the circuit, a differential current sense amplifier controls a series-pass P-Channel MOSFET to achieve high ripple rejection.
PAGE 7
PRODUCT SPECIFICATIONS Control Functions Enable Pin Connecting 2V or greater to the Enable pin will enable the output, while 0.4V or less will disable it while reducing the quiescent current consumption to less than 1µA. If this shutdown function is not needed, the pin can simply be connected permanently to the VIN pin. Allowing this pin to float will cause erratic operation.
PAGE 8
FAN2558/FAN2559 General PCB Layout Considerations For optimum device performance, careful circuit layout and grounding techniques must be used. Establishing a small local ground, to which the GND pin, and the output and bypass capacitors are connected, is recommended. The input capacitor should be grounded to the main ground plane. The quiet local ground is then routed back to the main ground plane using feed through via.
PAGE 9
PRODUCT SPECIFICATIONS FAN2558/FAN2559 Block Diagram (Note 6) VIN EN BYPASS Bandgap Shutdown Control Precharge/Fast Enable Shutdown Thermal Shutdown Load Current Sense Error Amplifier p VOUT n GND Out of Regulation Detection PG n Delay Over-Current Dropout Detection GND Note: 6. Fixed output voltage version. BYPASS pin is available for FAN2559 only. REV. 1.0.
PAGE 10
FAN2558/FAN2559 PRODUCT SPECIFICATIONS Typical Performance Characteristics Unless otherwise specified, CIN = COUT = 1µF, RPG = 47kΩ, TA = 25°C, EN = VIN Output Voltage vs. Temperature Output Voltage vs. Temperature VIN = 5.5V ILOAD = 180mA Output Voltage (V) Output Voltage (V) ILOAD = 0mA VIN = 5.5V Junction Temperature (°C) Junction Temperature (°C) Ground Current vs. Temperature Ground Current vs. Temperature ILOAD = 180mA VIN = 5.5V VIN = 2.7V Junction Temperature (°C) VIN = 2.
PAGE 11
PRODUCT SPECIFICATIONS FAN2558/FAN2559 Typical Performance Characteristics (Continued) Unless otherwise specified, CIN = COUT = 1µF, RPG = 47kΩ, TA = 25°C, EN = VIN Output Voltage vs. Input Voltage ILOAD = 100µA Output Voltage (V) Power Good Delay (mS) Power Good Delay vs. Input Voltage ILOAD =100µA ILOAD =180mA Input Voltage (V) Input Voltage (V) Output Voltage vs. Enable Voltage Output Voltage vs. Load Current COUT =1µF VIN =2.
PAGE 12
FAN2558/FAN2559 PRODUCT SPECIFICATIONS Typical Performance Characteristics (Continued) Unless otherwise specified, CIN = COUT = 1µF, RPG = 47kΩ, TA = 25°C, EN = VIN Enable Voltage (2V/div) Output Spectral Noise Density Enable Delay = 27.6µS VOUT =1.2V VIN =2.
PAGE 13
PRODUCT SPECIFICATIONS FAN2558/FAN2559 Mechanical Dimensions 2x2mm 6-Lead MLP REV. 1.0.
PAGE 14
FAN2558/FAN2559 PRODUCT SPECIFICATIONS Mechanical Dimensions 6-Lead SOT-23 Package 5-Lead SOT-23 Package B B e e c c L E L H E α α e1 e1 D D A A A1 Symbol Inches H A1 Millimeters Min Max Min Max A .035 .057 .90 1.45 A1 .000 .006 .00 .15 B .008 .020 .20 .50 c .003 .010 .08 .25 D .106 .122 2.70 3.10 E .059 .071 1.50 1.80 e .037 BSC .95 BSC e1 .075 BSC 1.90 BSC H .087 .126 2.20 3.20 L .004 .024 .10 .
PAGE 15
PRODUCT SPECIFICATIONS FAN2558/FAN2559 Ordering Information TA= -40°C to 85°C Part Number Output Voltage FAN2558 1.0V 1.2V 1.3V 1.5V 1.8V 2.5V 3.3V 3.5V 3.6V 3.8V 1.0V 1.2V 1.3V 1.5V 1.8V Adjustable FAN2559 1.0V 1.2V 1.3V 1.5V 1.8V 1.0V 1.2V 1.3V 1.5V 1.