National Semiconductor LP8900 Technical data

October 20, 2008

LP8900
Ultra Low Noise, Dual 200mA Linear Regulator for RF/
Analog Circuits

LP8900 Ultra Low Noise, Dual 200mA Linear Regulator for RF/Analog Circuits

General Description

The LP8900 is a dual linear regulator capable of supplying
200mA output current per regulator. Designed to meet the
requirements of RF/Analog circuits, the LP8900 provides low
device noise, High PSRR, low quiescent current and superior
line transient response figures.

Using new innovative design techniques the LP8900 offers
class-leading device noise performance without a noise by­pass capacitor.

The LP8900 is designed to be stable with space saving
ceramic capacitors as small as 0402 case size, enabling a
solution size <4mm 2.

Performance is specified for a -40°C to 125°C junction
temperature range.

Output voltage options are available between 1.2V and 3.6V,
for availability please contact your local NSC sales office.

Typical Application Circuit

Features

Operation from 1.8V to 5.5V Input

■

1% accuracy Over Temperature

■

Output Voltage from 1.2V to 3.6V

■

6µV

■

■

■

■

■

■

■

Output Voltage Noise

RMS

PSRR 75dB at 1kHz
110mV Dropout at 200mA load
48µA Quiescent Current per regulator
80µs Start-Up time
Stable with Ceramic Capacitors as small as 0402
Thermal-Overload and Short-Circuit Protection

Package

6 pin micro SMD (1.5mm x 1.1mm)

Applications

Battery Operated Devices

■

Hand-Held Information Appliances

■

Noise Sensitive RF Applications

■

DC/DC Convertor Post Regulation/Filter

■

30039302

© 2008 National Semiconductor Corporation 300393 www.national.com

Pin Descriptions

LP8900

Pin No. Symbol Name and Function

A1 V

B1 GND Common Ground.

C1 V

C2 V

B2 V

A2 V

Connection Diagram

Packages

EN

1

Enable Input; Enables the Regulator when ≥ 1.2V.
Disables the Regulator when ≤ 0.4V.
Enable Input has an internal 3MΩ pull-down resistor to GND.

EN

2

Enable Input; Enables the Regulator when ≥ 1.2V.
Disables the Regulator when ≤ 0.4V.
Enable Input has an internal 3MΩ pull-down resistor to GND.

2 Voltage output. A Low ESR Ceramic Capacitor should be

OUT

connected from this pin to GND. (See Application Information)
Connect this output to the load circuit.

IN

Voltage Supply Input. A 1.0µF capacitor should be connected from
this pin to GND.

1 Voltage output. A Low ESR Ceramic Capacitor should be

OUT

connected from this pin to GND. (See Application Information)
Connect this output to the load circuit.

6 Bump Thin Micro SMD, Large Bump

See NS package number TLA06

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30039306

Ordering Information (6-Bump Micro SMD)

Only available as Lead Free.

Output Voltage (V) Grade

Vout 1 Vout2

2.8V 2.8V LP8900TLE_3333 LP8900TLX_3333

2.8V 2.7V LP8900TLE_AAEB LP8900TLX_AAEB

*2.8V 1.2V LP8900TLE_AAEC LP8900TLX_AAEC

* Contact your local NSC Sales Office for availability

Order Number Supplied as 250 Units,

Tape and Reel

Order Number Supplied as 3000 Units,

Tape and Reel

LP8900

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Absolute Maximum Ratings

LP8900

(Notes 1, 2)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

VIN, V

VEN : Voltage to GND -0.3 to (VIN + 0.3V) to 6.5V

Junction Temperature 150°C

Pins: Voltage to GND

OUT

-0.3 to 6.5V

(max)

Operating Ratings (Note 1)

Input Voltage Range 1.8 to 5.5V
Recommended Load Current per

channel 200mA
Junction Temperature -40°C to 125°C
Ambient Temperature TA Range

(Note 6)

-40°C to 85°C

Lead/Pad Temp. (Note 3)
Micro SMD 260°C
Storage Temperature -65 to 150°C
Continuous Power Dissipation

Internally Limited

(Note 4)
ESD (Note 5)
Human Body Model 2KV
Machine Model 200V

Thermal Properties (Note 1)

Junction To Ambient Thermal
Resistance(Note 7)

θJA JEDEC Board

(Note 8)

θJA 4 Layer Board

Electrical Characteristics

Unless otherwise noted, VEN =1.2V, VIN = V
V

OUT2. CIN

= C

OUT

= 1µF, I

= 1.0mA .

OUT

Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full junction
temperature range for operation, −40 to +125°C. (Note 9)

Symbol Parameter Conditions Typ

V

ΔV

IN

OUT

Input Voltage (Note 10)

Output Voltage Tolerance VIN = V

Line Regulation Error VIN = V

Load Regulation Error I

V

DO

I

LOAD

I

Q

I

SC

Dropout Voltage(Note 11)

Load Current (Note 12)

Quiescent Current V

Short Circuit Current Limit VIN = 3.6V (Note 13) 600 900

PSRR Power Supply Rejection Ratio

(Note 14)

e

n

T

SHUTDOWN

Output noise Voltage (Note 14)

Thermal Shutdown Temperature 155

+ 0.5V, or 1.8V, whichever is higher , where V

OUT

is the higher of V

OUT

Min Max

1.8 5.5 V

OUT(NOM)

I

= 1mA

LOAD

OUT(NOM)

I

= 1mA

OUT

= 1mA to 200mA , V

OUT

I

= 200mA

OUT

+ 0.5V to 5.5V

+0.5V to 5.5V,

OUT

V

= 3.6V

OUT

V

= 2.8V 110

OUT

V

= 1.8V 185

OUT

= 2.8V 4 9

-1.0 1.0 %

0.05 %/V

55

0

= 1.2V, V

EN1

V

= 1.2V, V

EN1

V

= 1.2V, V

EN1

VEN ≤ 0.4V

f = 1kHz, I

f = 10kHz, I

f = 100kHz, I

f = 1MHz, I

BW = 10Hz to
100kHz,
VIN = 4.2V, C

1.0µF

= 0V I

EN2

= 1.2V I

EN2

= 1.2V I

EN2

= 200mA 75

OUT

= 200mA 65

OUT

= 200mA 45

OUT

= 200mA 30

OUT

=

OUT

I

OUT

I

OUT

I

OUT

= 0mA

OUT

= 0mA

OUT

= 200mA

OUT

= 0mA

= 1mA

= 200mA

48

85

210

0.003

6

10

6

Hysteresis 15

Limit

82

164

260

200

120

200

1.0

OUT1

108°C/W

172°C/W

and

Units

mV

mV

mA

µA

mA

dB

µV

RMS

°C

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Electrical Characteristics con't.

Unless otherwise noted, VEN =1.2V, VIN = V
V

OUT2. CIN

= C

OUT

= 1µF, I

OUT

= 1mA.

Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full junction
temperature range for operation, −40 to +125°C. (Note 9)

Symbol Parameter Conditions Typ

Enable Control Characteristics

I

EN

Maximum Input Current at
VEN Input(Note 15)

V

IL

V

IH

Low Input Threshold VIN = 1.8V to 5.5V

High Input Threshold VIN = 1.8V to 5.5V

Timing\Transient Characteristics(Note 14)

T

ON

T

OFF

Transient

Turn On Time To 95% Level

Turn Off Time 5% of V

Line Transient Response |δV

Load Transient Response |δV

Response

Overshoot on Start-up 0 1 %

+ 0.5V, or 1.8V, whichever is higher, where V

OUT

VEN = 0V, VIN = 5.5V

is the higher of V

OUT

0.003

VEN = VIN = 5.5V 4

80

0.4 1 ms

1

80

70

OUT

OUT

|

|

V

OUT(nom)

OUT(NOM),IOUT

T

= T

rise

= 30µs

fall

δVIN = 600mV

T

= T

rise

= 1µs I

fall

= 0mA

= 1 mA to 200mA

OUT

I

= 200mA to 1mA

OUT

Limit

Min Max

0.4 V

1.2

200 µs

OUT1

and

(pk - pk)

LP8900

Units

µA

V

mV

mV

Note 1: Absolute Maximum Ratings are limits beyond which damage can occur. Operating Ratings are conditions under which operation of the device is
guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.

Note 2: All Voltages are with respect to the potential at the GND pin.

Note 3: For further information on these packages please refer to the following application notes,AN-1112 Micro SMD Wafer Level Chip Scale Package.

Note 4: Internal thermal shutdown circuitry protects the device from permanent damage.

Note 5: The human body model is 100pF discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into

each pin.

Note 6: The maximum ambient temperature (T
dissipation of the device in the application (P
following equation: T

Note 7: Junction to ambient thermal resistance is dependant on the application and board layout. In applications where high maximum power dissipation is
possible, special care must be paid to thermal dissipation issues in board design.

Note 8: Full details can be found in JESD61-7

Note 9: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production at TJ = 25°C or correlated using

Statistical Quality Control methods. Operation over the temperature specification is guaranteed by correlating the electrical characteristics to process and
temperature variations and applying statistical process control.

Note 10: The minimum input voltage = V

Note 11: Dropout voltage is voltage difference between input and output at which the output voltage drops to 100mV below its nominal value. This parameter is

only specified for output voltages above 1.8V.

Note 12: The device maintains the regulated output voltage without a load.

Note 13: Short circuit current is measured with V

Note 14: This electrical specification is guaranteed by design.

Note 15: Enable Pin has an internal 3MΩ typical, resistor connected to GND.

Note 16: The capacitor tolerance should be 30% or better over temperature. The full operating conditions for the application should be considered when selecting

a suitable capacitor to ensure that the minimum value of capacitance is always met. Recommended capacitor type is X7R or X5R. (See capacitor section in
Applications Hints)

A(max)

= T

J(max-op)

- (θJA × P

OUT(NOM)

) is dependant on the maximum operating junction temperature (T

A(max)

), and the junction to ambient thermal resistance of the part / package in the application (θJA), as given by the

D(max)

).

D(max)

+ 0.5V or 1.8V, whichever is greater.

pulled to 0V.

OUT

= 125°C), the maximum power

J(max-op)

Recommended Capacitor Specifications

Symbol Parameter Conditions Typ

C

IN

C

OUT

Input Capacitor

Output Capacitor

Capacitance
(Note 16)

ESR

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Limit

Min Max

Units

1.0 0.33 10 µF

1.0 0.33 4.7

5 500

mΩ