Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
250 mA CMOS Low Dropout LDO
B4250
Pin Connection
Ordering Information
-40
C to +125
C
Package
Part No.
SOT-23 B4250CK3
-X.X
SOT-89 B4250CR-X.X
X.X = Fixed Output Voltages from 2.0V to 6.0V
Description
The B4250 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 B4250 consists of a high-precision voltage
reference, an error correction circuit, and a current
limited output driver.
Available in SOT-23 (150mW) and SOT-89 (500mW)
packages minimizing the usage of board real state.
Features
Maximum output current: 250 mA.
Highly accurate: Output voltage +/- 2%. (1%)
CMOS low power consumption.
Small input/output differential:
0.38V at 160mA (Vout=3.3V)
0.12V at 100mA (Vout=5V)
Pin-to-Pin Improve XC62FP/XC6201
Applications
Battery Powered Equipment
Notebook PC, Palmtops, PDA
Portable Cameras and Video Recorders
Reference Voltage Sources
SOT-23-3 (K3)
Top View
V
out
V
in
V
ss
3
2
1
Top View
SOT-89 (R)
1
2
3
Vss Vin Vout
2
Vin
Bay Linear
Bay Linear
Bay Linear
Bay Linear
Inspire the Linear Power
Inspire the Linear Power
Inspire the Linear Power
Inspire the Linear Power
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B4250
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Units
Input Voltage
V
IN
12 V
Output Current
I
OUT
500
mA
Output Voltage
V
OUT
V
SS
-0.3 to V
IN
0.3
V
Continual Total
Power Dissipation
SOT-23
SOT-89
Pd
150
500
mW
Operating Ambient Temperature
T
OPR
-30 to 80
C
Storage Temperature
T
STG
-40 to 125
C
Electrical Characteristics (T
a
= 25
C, V
IN
= V
OUT +
1V; unless otherwise noted)
Parameter
Conditions
MIN
TYP
MAX UNIT
3.3V I
O
= 40mA, V
IN
= 4.3V
3.234
3.300
3.366
Output Voltage
5.0V I
O
= 40mA, V
IN
= 6.0V
4.900
5.000
5.100
V
3.3V I
O
= 40mA, 4.3V<V
IN
<10V
Line Regulation
V
OUT
/
V
IN
-V
OUT
5.0V I
O
= 40mA, 6.0V<V
IN
<10V
0.2 0.3 %V
3.3V
VIN 4.3V, 1mA < I
O
< 80mA
45
90
Load Regulation
5.0V
VIN 6V, 1mA < I
O
< 100mA
40
80
mV
3.3V V
IN
= 4.3V
1.0
2.9
Current Consumption
5.0V V
IN
= 6.0V
2.0
4.5
A
3.3V I
O
= 160 mA
0.4
0.7
0.12 0.3
Dropout Voltage
5.0V
I
O
= 100 mA
200 mA
0.38 0.6
V
Marking Format
SOT-23
SOT-89
CXWW
B4250
XZYWW
C = B4250
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
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B4250
Output Voltage vs. Output Current
B4250-3.0
Output Voltage vs. Input Voltage
B4250-3.0
Dropout Voltage vs. Output Current
B4250-3.0
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B4250
Supply Current vs. Input Voltage (B4250-3.0)
Input Transient Response (B4250-3.0)
Load Transient Response (B4250-3.0) Ripple Rejection Ratio (B4250-3.0)
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B4250
STANDARD CIRCUIT
SOT-23
0.015 - 0.018
(0.381 - 0.457)
0.020 - 0.024
(0.508 - 0.610)
0.110 - 0.120
(2.794 - 3.048)
0.001 - 0.004
(0.025 - 0.102)
0.030 - 0.041
(0.762 - 1.041)
0.018 - 0.024
(0.457 - 0.610)
0.070 - 0.080
(1.778 - 2.032)
0.035 - 0.040
(0.889 - 1.016)
0.047 - 0.055
(1.194 - 1.397)
0.083 - 0.098
(2.108 - 2.489)
0.003 - 0.005
(0.076 - 0.127)
V
IN
C
IN
Tantanium
V
IN
V
SS
V
OUT
R
L
C
L
1
Tantanium
V
IN
C
IN
Tantanium
V
IN
V
SS
V
OUT
R
L
C
L
1
Tantanium
F
V
IN
C
IN
Tantanium
V
IN
V
SS
V
OUT
R
L
C
L
1
Tantanium
V
IN
C
IN
Tantanium
V
IN
V
SS
V
OUT
R
L
C
L
1
Tantanium
F
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