Datasheet B4300CR-6.0, B4300CR-5.9, B4300CR-5.8, B4300CR-5.7, B4300CR-5.6 Datasheet (BAYLI)

Bay Linear, Inc

2478 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

300 mA CMOS Low Dropout LDO

B4300

Pin Connection

Ordering Information

Package Part No.

SOT-89 B4300CR-X.X

SOT-223 B4300CN-X.X

X.X = Fixed Output Voltages from 2.0V to 6.0V

Top View

SOT-89 (R)

1

2

3

Vss Vin Vout

2

Vin

Description

The B4300 series are a group of positive output voltage,
three-pin regulators, which provide a high current even
when the input/output voltage differential is small. Low
power consumption and high accuracy is achieved
though CMOS and programmable fuse technologies.
Output voltage: 2.0V to 6.0V in 0.1V increments.

The B4300 consists of a high-precision voltage
reference, an error correction circuit, and a current
limited output driver.

Available in SOT-89 (300mW), and SOT-223 (500mW)
packages minimizing the usage of board real state.

Features

• Maximum output current: 300 mA.

• Highly accurate: Output voltage +/- 1.4%

• Extremely Low Ground Current 6µA

• CMOS low power consumption.

• Over-Current & Over-Temp. Protection

• Small input/output differential:

0.3V @ 300mA

0.1V @ 100mA

• Pin-to-Pin replacement for TC1108 & XC6203

• Offered in SOT-89 & SOT-223

Applications

• Battery Powered Equipment

• Notebook PC, Palmtops, PDA

• Portable Cameras and Video Recorders

• Reference Voltage Sources

Top View

SOT-223 (N)

1

2

3

Vss Vin Vout

2

Vin

Bay Linear

Inspire the Linear Power

Bay Linear, Inc

2478 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

B4300

Absolute Maximum Ratings

Parameter Symbol Ratings Units

Input Voltage VIN 6.5 V
Output Current I

OUT

300 mA

Output Voltage V

OUT

V

SS

-0.3 to VIN 0.3 V
Continual Total
Power Dissipation

SOT-89
SOT-223

Pd

300
500

mW

Operating Ambient Temperature T

OPR

-30 to 80

°C

Storage Temperature T

STG

-40 to 125

°C

Electrical Characteristics (Ta = 25°C, V

IN

= V

OUT +

0.5V; unless otherwise noted)

Parameter Conditions MIN TYP MAX UNIT

IO = 0mA -1.4% - +1.4%

Output Voltage

I

O

= 0 to 300mA -2% - +2%

V

Line Regulation ∆V

OUT

/∆VIN-

V

OUT

I

O

100mA,

(V

OUT

+ 0.1V)<VIN<6V

0.2 0.3 %/V

Load Regulation

VIN 6V, 0mA < I

O

< 300mA

C

OUT

= µF

0.04 %/mV

Maximum Output Current 300
Current Limit 400

mA

Output Noise

F=10KHz, C

out

=1µF, R

LOAD

=50Ω

260

nV/√

Hz
Input Operation Voltage 6.0 V
Ground Pin Current I

OUT

= 100mA

2 6

µA

IO = 100mA 110 160

Dropout Voltage

I

O

= 300 mA

270 480

mV

Thermal Shutdown Temperature

155

°C

Marking Format

SOT-89

B4300

XZYWW

D = B4300

Variables

X = Voltage Codes

Z = Production

Code

Y = Year WW = Work Week Code

B = 2.0 F = 3.3

01 = 2001 SOT-23 = 01 to 99

C = 2.5 G = 3.5

02 = 2002 SOT-89 = 01 to 52

D = 2.8 H = 5.0

03 = 2004

E = 3.0

etc

Bay Linear, Inc

2478 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

B4300

PRODUCT DESCRIPTION

The B4300 is precision fixed output voltage regulator.
Unlike bipolar regulators, the B4300 supply current
does not increase with load current. In addition, V

out

remains stable and within regulator at very low load
currents (an important consideration in RTC and
CMOS RAM battery back-up application).

Figure 1 shows a typical application circuit. The
regulator is enabled any time the shutdown input is at
or above V

IH.

And shutdown (disabled) when SHDN is

at or below V

IL

. SHDN maybe controlled by a CMOS
logic gate, or I/O port of a micro controller. If the
SHDN input is not. Required, it should be connected
directly to the supply. While in shutdown, supply
current decreases to 0.05µA (typical) and V

out

falls to

zero volts.

Output Capacitor

A 1µF (min) capacitor from V

out

to ground is required.

Then output capacitor should have an effective series
resistance of 5Ω or less. A 1µA capacitor should be
connected from V

in

to GND if there is more than 10
inches of wire between the regulator and the AC filter
capacitor, or if a battery is used as the power source.
Aluminum electrolytic or tantalum capacitor types can
be used. (since many aluminum electrolytic capacitors
freeze at approximately- 30°C, solid tantalums are
recommended for applications operating below –25
°C.) When operating from sources other than
batteries, supply-noise rejection and transient response
can be improved by increasing the value of the input
and output capacitors and employing passive filtering
techniques.

Thermal Considerations

Thermal Shutdown

Integrated thermal protection circuitry shuts the
regulator off when die temperature exceeds 160°C.
The regulator remaining off until the die temperature
drops to approximately 140 °C.

Power Dissipation

The amount of power the regulator dissipates is
primarily a function of input and output voltage, and
output current. The following equation is used to
calculate worst case power dissipation:

P

D

=(V

INMAX-VOUTMIN)ILOADMAX

Where:
P

D

= worst case actual power dissipation

V

INMAX

= Maximum voltage on V

IN

V

OUTMIN

=Minimum regulator output voltage

I

LOADMAX

= maximum output (LOAD) Current

The maximum allowable power dissipation is function
of the maximum ambient temperature (T

AMAX

). The

maximum allowable die temperature (125°C) and the
thermal resistance from junction-to-air (θ

JA

).

P

DMAX

=(T

JMAX-TAMAX

)/ θ

JA

Where all terms are previously defined

This can be caused in conjunction with other equation
to ensure regulator thermal operation is within limit.
For example:

Given:

V

INMAX

=3.3V+10%

V

OUTMIN

=2.7V-2.5%

I

LOADMAX

=275 mA

T

JMAX

=125°C

T

AMAX

=95°C

θ

JA

= 59°C/W

Find:

1. Actual power dissipation

2. Maximum allowable dissipation

BATTREY

C

1

1µF

V

IN

GND

V

OUT

C

2

1µF

B4300

BATTREY

C

1

1µF

V

IN

GND

V

OUT

C

2

1µF

B4300

Bay Linear, Inc

2478 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

B4300

A

1

2

3

P

K

F

G

D

B

STYLE 1

PIN 1. BASE

2. COLLECTOR

3. EMITTER

STYLE 3

PIN 1. GATE

2. ANODE

3. CATHODE

STYLE 2

PIN 1. ANODE

2. CATHODE

3. NO CONNECTION

PIN 1. DRAIN

2. GATE

3. SOURCE

STYLE 4

MILLIMETERS INCHES

DIM

MIN MAX MIN MAX
A 4.40 4.60 0.174 0.181
B 2.29 2.60 0.091 0.102
C 140 160 0.056 0.062
D 0.36 0.48 0.015 0.018
E 1.62 1.80 0.064 0.070
F 0.44 0.53 0.018 0.020
G
J 0.35 0.44 0.014 0.017
K 0.80 1.04 0.032 0.040
L 300 BSC 0.118 BSC
N 2.04 2.28 0.081 0.089
P 3.94 4.25 0.156 0.167

150 BSC 0.059 BSC

-T-

N

C

J

Bay Linear, Inc

2478 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

B4300

Bay Linear, Inc

2478 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
computer simulations and/ or initial prototype evaluation.

Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.

The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit
design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any
industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different
applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.

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