ETC B1129

Bay Linear
Inspire the Linear Power
1.00Amp High Current Low Dropout
Voltage Regulator Adjustable & Fix
Description
B1129/B1129-3.3/B1129-5.0
Features
The Bay Linear B1129 is a 1 Amp high accuracy, low dropout
voltage regulator with only 40mV at light loads and
450mV(Typ.)@ 1.0A) and low quiescent current of 240µA typical.
The B1129 is designed for low voltage a application that requires
lower dropout voltage and faster transient response. This device is
an excellent choice for use in powering low voltage applications
where require a lower dropout, faster transient response and as a
post regulator for switching supplies applications.
The B1129 offers full protection against over-current faults,
reversed input polarity, reversed load insertion, and positive and
negative transient voltage. On-Chip trimming adjusts the reference
voltage to 1%. The B1129-xx devices are in 3 pin fixed voltage
regulators. The B1129 include an Enable pin in the 5 pin packages.
The B1129are offered in a 3 & 5-pin SOT-223 & TO-263 package
compatible with other 3 terminal regulators. .
Pin Connection
•
•
•
•
•
•
•
•
•
•
High output accuracy of 2% 3.3V & 5.0V
Output Adjustable from 1.24V to 26V
Output Current of 1.00A
Low Dropout Voltage
Low quiescent current
Extremely Tight Load & Line Regulation
Reverse-battery and “Load Dump” Protection
Zero Current Shutdown Mode (5-pin version)
Offer in TO-263, & SOT-223
Similar to industry Standard LT1129
Applications
•
•
•
•
•
•
•
Powering VGA & Sound Card
LCD Monitor
Battery Powered Equipments/Laptop & Notebook
SMPS Post Regulator / DC to DC Modules
High Efficiency Linear Power Supply
Adjustable Power Supply
Bar Code Scanners
Ordering Information
Devices
B1129N-X
B1129S
Package
Temp.
SOT-223
TO-263
-40 °C to 125 °C
-40 °C to 125 °C
TO-263-5 Package
1) OUT
BAY
B1129
B2941
1
2 3 4 5
2) ADJ
3) GND
4) ON/OFF
SOT-223
Tab GND
5) OUPUT
Top View
Bay Linear, Inc
Adj/GND
IN GND
OUT OUT
IN
Front View
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com
B1129
ABSOLUTE MAXIMUM RATINGS
Lead Temp. (Soldering, 5 Seconds).................................260°C
Storage Temperature Range.............................. -65° to +150°C
Operating Junction Temperature Range
B1129/2941 Control Section ..................... -45°C +125°C
B1129/2941 Power Transistor....................-45°C +150°C
Input Voltage ........................................................26V
Maximum Output Current....................................3.5A
Input Supply Voltage (Note1) (Survival)-20V to +60V
ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 5mA, V IN =V OUT + 1V, I l = 1000mA, C L = 10µF. Ta=25°C, unless otherwise
specified. The B1129 is programmed to output 5V and has V SHUTDOWN ≤ 0.6V
PARAMETER
CONDITIONS
Typ
B1129
Min
Units
Max
3.3V Version2.
Output Voltage (Note 2)
IOUT = 5mA
5mA ≤IOUT≤1.00A, 4.75V≤VIN ≤26V
3.30
3.30
3.250
3.200
3.350
3.400
V
IOUT = 5mA
5mA ≤IOUT≤1.00A, 5.5V≤VIN ≤26V
5.00
5.00
4.925
4.850
-1
-2
-2.5
5.075
5.150
1
2
2.5
V
%
5.0V Version
Output Voltage (Note 2)
Output Voltage
Accuracy
5mA ≤IOUT≤1.0 A
All Voltage Options
Line Regulation
Load Regulation
IO = 5mA, (VOUT + 1V) ≤ VIN≤ 26V
VIN = VOUT + 5V, 5mA ≤ IOUT≤ 1 A
(Note 2, 6)
1.5
6
10
20
mA
mA
Dropout Voltage
IO = 10mA
40
200
mV
IO = 500mA
370
450
IO = 1.00A
450
550
Ground Current
IO = 10mA, VIN = VOUT, +1V
IO = 500mA, VIN = VOUT, +1V
IO = 1.00A
310
25
50
450
45
80
IGNDDO Ground Pin Current at
Dropout
Current Limit
Output Noise Voltage
(10Hz to 100kHz)
IL = 100mA
Reference Voltage
VIN = 0.5V less than specified VOUT IOUT = 10mA
0.9
Reference Voltage
Adjust Pin
Bias Current
Reference Voltage
Temperature
Coefficient
Adjust Pin Bias
Current Temperature
Coefficient
(Note 8)`
Bay Linear, Inc
VOUT = 0V (Note 4)
1.7
CL = 10µF
400
CL = 33µF
mA
1.5
A
µV RMS
260
1.235
40
(Note 7)
µA
mA
1.223
1.210
1.204
1.247
1.260
1.266
V
Vmax
V
80
120
nA
20
ppm/°C
0.1
nA/°C
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com
B1129
ENABLE Input B1129
Input Logic Voltage
Low (OFF)
High (ON)
V
0.8
2.4
Enable Pin
Input Current
VEN = 26V
Regulator Output
Current in Shutdown
(Note 10)
100
600
750
2.5
5
VEN = 0.8V
V
µA
µA
10
500
NOTES:
The Bold specifications apply to the full operating temperature range.
Note 1: Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle.) The maximum continuous supply voltage is 26V.
Note 2: Full load current (IFL) is defined as 1.00A for the B1129.
Note 3: Dropout voltage is defined as the input-to output differential when the output voltage drops to 99% of its nominal value with VOUT + 1V applied to VIN.
Note 4: VIN = VOUT (NOMINAL) +1V. For example, use VIN= 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current.
Note 6: Output voltage temperature coefficient is defined as the worst case voltage changed divided by the total temperature range.
Note 7: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation
effects. Specifications are for a 200mA load pulse as VIN = 20V (a 4W pulse) for T = 10ms.
Note 8: VREF ≤ VOUT ≤ (VIN - 1), 2.3V ≤ VIN≤ 26V, 10mA < IL ≤ IFL, TJ ≤ TJMAX
Note 9: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V input. To express
these thresholds in terms of output voltage change, multiply the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmable output voltage of
5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Threshold remains constant as a percent of VOUT as VOUT is varied,
with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.
Note 10: VEN ≤ 0.8V and VIN≤ 26V, VOUT = 0.
BLOCK DIAGRAM
IN
OUT
O.V
ILIMIT
FLAG
+
-
1.180V
Reference
1.240V
28V
+
R1*
ADJ
EN
Thermal
Shutdown
R2*
GND
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
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.
LIFE SUPPORT AND NUCLEAR POLICY
Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body
to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear
President.
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com