Bay Linear
Inspire the Linear Power
250 mA CMOS Low Dropout LDO
B4250
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
Pin Connection
Ordering Information
-40°C to +125°C
°
°
Package
SOT-23
Part No.
B4250CK3 -X.X
B4250CR-X.X
SOT-23-3 (K3)
SOT-89
SOT-89 (R)
Vin
2
V
in
3
1
2
X.X = Fixed Output Voltages from 2.0V to 6.0V
1
Vss
2
3
V
ss
V
out
Top View
Vin Vout
Top View
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
Input Voltage
Output Current
Output Voltage
Continual Total
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Symbol
V
IN
I
OUT
V
OUT
SOT-23
SOT-89
Pd
T
OPR
T
STG
Ratings
12
500
V
SS
-0.3 to V
IN
0.3
150
500
-30 to 80
-40 to 125
Units
V
mA
V
mW
°C
°C
Electrical Characteristics (T
a
= 25°C, V
IN
= V
OUT +
1V; unless otherwise noted)
°
Parameter
Output Voltage
Line Regulation
∆V
OUT
/∆V
IN
-V
OUT
Load Regulation
Current Consumption
Dropout Voltage
3.3V
5.0V
3.3V
5.0V
3.3V
5.0V
3.3V
5.0V
3.3V
5.0V
Conditions
I
O
= 40mA, V
IN
= 4.3V
I
O
= 40mA, V
IN
= 6.0V
I
O
= 40mA, 4.3V<V
IN
<10V
I
O
= 40mA, 6.0V<V
IN
<10V
VIN 4.3V, 1mA < I
O
< 80mA
VIN 6V, 1mA < I
O
< 100mA
V
IN
= 4.3V
V
IN
= 6.0V
I
O
= 160 mA
I
O
= 100 mA
200 mA
MIN
3.234
4.900
TYP
3.300
5.000
0.2
45
40
1.0
2.0
0.4
0.12
0.38
MAX
3.366
5.100
0.3
90
80
2.9
4.5
0.7
0.3
0.6
UNIT
V
%V
mV
µA
V
Marking Format
SOT-23
SOT-89
CXWW
C = B4250
B4250
XZYWW
Variables
X = Voltage Codes
B = 2.0
C = 2.5
D = 2.8
E = 3.0
F=
G=
H=
3.3
3.5
5.0
Z = Production
Code
Y = Year
01 = 2001
02 = 2002
03 = 2004
etc
WW = Work Week Code
SOT-23 = 01 to 99
SOT-89 = 01 to 52
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
V
IN
V
OUT
V
IN
C
IN
Tantanium
V
SS
C
L
1
µ
F
Tantanium
R
L
SOT-23
0.015 - 0.018
(0.381 - 0.457)
0.047 - 0.055 0.083 - 0.098
(1.194 - 1.397) (2.108 - 2.489)
0.035 - 0.040
(0.889 - 1.016)
0.020 - 0.024
(0.508 - 0.610)
0.070 - 0.080
(1.778 - 2.032)
0.110 - 0.120
(2.794 - 3.048)
0.003 - 0.005
(0.076 - 0.127)
0.001 - 0.004
(0.025 - 0.102)
0.030 - 0.041
(0.762 - 1.041)
0.018 - 0.024
(0.457 - 0.610)
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
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