BAYLI B34063AM, B34063AIP, B34063AIM, B34063AEM, B34063AP Datasheet
Bay Linear
Inspire the Linear Power
1.5Amp DC-to-DC Converter Control Circuit
Description
The Bay Linear B34063A series is monolithic control circuit
containing the primary functions required for DC-to-DC
converters. These devices consist of an internal temperature
compensated reference, comparator, controlled, duty cycle
oscillator with an active current limit circuit, driver and high
current output switch.
This series was specially designed to be incorporated in StepDown and Step-Up and voltage-inverting applications with a
minimum number of external component.
The B34063A is offer in 8-pin DIP or Surface mount package.
Features
• Operation from 3.0V to 40V input
•
Low Standby Current
• Current Limiting
• Output Switch Current to 1.5A
Output voltage Adjustable
•
•
Frequency Operation to 100 kHz
Precision 2% Reference
•
•
Step-Up-Step Down or inverting Switching
regulator
• Direct Replacement for MC34063
Applications
• CD ROM
• Mother Board
• SMPS Power Supply
Pin Connection
Ordering Information
SO-8
8-pin
B34063AM B34063AP
B34063AIM B34063AIP
B34063AEM B34063AEP
All Marking will be B34063X. The Temperature will be specified
in out side Box. X=Package type
Switch
Switch
Collector
Collector
Switch
Switch
Emitter
Emitter
Timin g
Timin g
Capacitor
Capacitor
GND
GND
P-DIP
8-pin
8-Pin Surface Mount
8-Pin Surface Mount
1
1
2
2
3
3
4
4
Top View
Top View
8
8
7
7
6
6
5
5
B34063A
Operating
Temp. Range
0°C to 70°C
-40°C to 85°C
-40°C to 125°C
Driver
Driver
Collector
Collector
I
I
Sense
Sense
PK
PK
V
V
CC
CC
Comparator
Comparator
Inverting Input
Inverting Input
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B34063A
Absolute Maximum Rating
Parameter Symbol Value Unit
Supply Voltage V
Comparator Input Voltage Range V
Switch Collector Voltage V
Switch Emitter Voltage V
Switch Collector to Emitter
V
Voltage
Driver Collector Voltage V
Switch Current I
CC
I(COMP)
C(SW)
E(SW)
CE(SW)
C(DR)
SW
40 V
-0.3 ∼ + 40
V
40 V
40 V
40 V
40 V
1.5 I
Electrical Characteristics
(V
= 5.0V, TA = T
CC
LOW
to T
(Note 3), unless otherwise specified)
HIGH
Parameter Symbol Conditions MIN TYP MAX UNIT
OSCILATOR
Charging Current I
Discharging Current I
Frequesncy f
Discharge in To Charge
Current Ratio
Current Limit Sense Voltage V
SENSE(C.L)
OUTPUT SWITCH (Note 4)
Saturation Voltage
Darlington Connection
Saturation Voltage (Note 5) V
DC Current Gain G
Collector off Sate Current I
COMPARATOR
Threshold Voltage V
Threshold Voltage Line Reg.
B34063A, B34063AI
B34063AE
Input Bias Current I
TOTAL DEVICE
Supply Current I
V
CE(SAT)
CE(SAT)
∆V
CHG
DISHG
OSC
VVV=5 to 40V, TA = 25 °C
VCC = 5 to 40V, TA = 25 °C
TA = 25 °C
K V7 = V
TA = 25 °C
I
CHG
1
ISW = 1.0A, Pins 1, 8 connected
V
C(drive)
2
I
SW
I(DC)
C(OFF)
TH
BIAS
CC
I
SW
V
CE
TA = 25 °C
T
A
V
TH
CC
VI = 0V -20 -400 nA
VCC = 5V to 40V, CT = 0.001µF,
Pin7=V
Remaining pins open
CC
= I
DISCHG, TA
= V
= 1.0A, V
= 1.0A, V
= 25 °C
C(SW)
= 50mA - 0.45 0.7 V
C(drive)
= 5.0V, TA = 25 °C
CE
= 40V - 40 100
= T
to T
high
LOW
= 3V to 40V
, V5 >V
CC
pin2=Gnd,
TH
24 35 42
140 220 260
µA
µA
24 33 42 kHz
5.2 6.5 7.5 -
250 300 350 mV
- 1.0 1.3 V
50 75 - -
µA
1.225
1.21
-
-
1.25 1.275
1.29
1.4
1.4
5.0
6.0
V
mV
- - 4.0 mA
Note3: T
B34063AE
Note4: Low Duty cycle pulse techniques are used during test to maintain junction temp. as close to ambient temp. as possible.
Note5: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch current (≤300mA) and high driver currents
(≥30mA). It may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz. And is
magnified at high temperatures. This condition does not occur with a Darlington configuration. Since the output switch can not saturate. If a nonDarlington configuration is used the following output drive condition is recommended:
The 100Ω resistor is the emitter of the driver device requires about 7.0 mA before the output switch conducts
= 0 °C for B34063A, - 40 °C for B34063AI, AE, T
low
Forces β of output switch : Ic output/Ic driver – 7.0mA ≥10
= +70°C for the B34063A, T
high
= +85°C for the B34063AI, +125°C for the
high
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B34063A
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
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