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Motorola Electronic Components Datasheet

MC33129 Datasheet

(MC33129 / MC34129) High Performance Current Mode Controller

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Order this document by MC34129/D
High Performance
Current Mode Controllers
The MC34129/MC33129 are high performance current mode switching
regulators specifically designed for use in low power digital telephone
applications. These integrated circuits feature a unique internal fault timer
that provides automatic restart for overload recovery. For enhanced system
efficiency, a start/run comparator is included to implement bootstrapped
operation of VCC. Other functions contained are a temperature compensated
reference, reference amplifier, fully accessible error amplifier, sawtooth
oscillator with sync input, pulse width modulator comparator, and a high
current totem pole driver ideally suited for driving a power MOSFET.
Also included are protective features consisting of soft–start,
undervoltage lockout, cycle–by–cycle current limiting, adjustable deadtime,
and a latch for single pulse metering.
Although these devices are primarily intended for use in digital telephone
systems, they can be used cost effectively in many other applications.
Current Mode Operation to 300 kHz
Automatic Feed Forward Compensation
Latching PWM for Cycle–by–Cycle Current Limiting
Continuous Retry after Fault Timeout
Soft–Start with Maximum Peak Switch Current Clamp
Internally Trimmed 2% Bandgap Reference
High Current Totem Pole Driver
Input Undervoltage Lockout
Low Startup and Operating Current
Direct Interface with Motorola SENSEFET Products
MC34129www.DataSheet4U.com
MC33129
HIGH PERFORMANCE
CURRENT MODE
CONTROLLERS
SEMICONDUCTOR
TECHNICAL DATA
14
1
P SUFFIX
PLASTIC PACKAGE
CASE 646
14
1
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
PIN CONNECTIONS
CSoft–Start 12
7
Gnd
6
Vref 2.5V
5
RT/CT
Sync/Inhibit 4
Input
Simplified Block Diagram
Soft–Start
and
Fault Timer
Start/Run
13 Start/Run
Output
Undervoltage 14
Lockout
VCC
1.25V
Reference
8
Vref 1.25V
X2
Oscillator
Latching
PWM
Error Amp
9
+
10
Noninverting
Input
Inverting
11
Input
Feedback/
1 PWM Input
Drive Out
2
Drive Gnd
3
Ramp Input
Drive Output 1
Drive Ground 2
Ramp Input 3
Sync/Inhibit
Input
4
RT/CT 5
Vref 2.5 V 6
Gnd 7
14 VCC
13 Start/Run Output
12 CSoft–Start
Feedback/
11 PWM Input
10
Error Amp
Inverting Input
9 Error Amp
Noninverting Input
8 Vref 1.25 V
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC34129D
MC34129P
TA = 0° to +70°C
SO–14
Plastic DIP
MC33129D
TA = – 40° to +85°C
MC33129P
SO–14
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1


Motorola Electronic Components Datasheet

MC33129 Datasheet

(MC33129 / MC34129) High Performance Current Mode Controller

No Preview Available !

MAXIMUM RATINGS
Rating
VCC Zener Current
Start/Run Output Zener Current
Analog Inputs (Pins 3, 5, 9, 10, 11, 12)
Sync Input Voltage
Drive Output Current, Source or Sink
Current, Reference Outputs (Pins 6, 8)
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package Case 751A
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, Junction–to–Air
P Suffix, Plastic Package Case 646
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature
MC34129
MC33129
Storage Temperature Range
MC34129 MC33129
Symbol
IZ(VCC)
IZ(Start/Run)
Vsync
IDRV
Iref
Value
50
50
–0.3 to 5.5
–0.3 to VCC
1.0
20
Unit
mA
mA
V
V
A
mA
PD
RθJA
PD
RθJA
TJ
TA
Tstg
552
145
800
100
+150
0 to +70
–40 to +85
–65 to +150
mW
°C/W
mW
°C/W
°C
°C
°C
www.DataSheet4U.com
ELECTRICAL CHARACTERISTICS (VCC = 10 V, TA = 25°C [Note 1], unless otherwise noted.)
Characteristics
Symbol
Min
REFERENCE SECTIONS
Reference Output Voltage, TA = 25°C
1.25 V Ref., IL = 0 mA
2.50 V Ref., IL = 1.0 mA
Reference Output Voltage, TA = Tlow to Thigh
1.25 V Ref., IL = 0 mA
2.50 V Ref., IL = 1.0 mA
Line Regulation (VCC = 4.0 V to 12 V)
1.25 V Ref., IL = 0 mA
2.50 V Ref., IL = 1.0 mA
Load Regulation
1.25 V Ref., IL = –10 µA to +500 µA
2.50 V Ref., IL = –0.1 mA to +1.0 mA
ERROR AMPLIFIER
Vref
Vref
Regline
Regload
1.225
2.375
1.200
2.250
Input Offset Voltage (Vin = 1.25 V)
TA = 25°C
TA = Tlow to Thigh
VIO
Input Offset Current (Vin = 1.25 V)
IIO
Input Bias Current (Vin = 1.25 V)
TA = 25°C
TA = Tlow to Thigh
IIB
Input Common Mode Voltage Range
VICR
Open Loop Voltage Gain (VO = 1.25 V)
AVOL
Gain Bandwidth Product (VO = 1.25 V, f = 100 kHz)
GBW
Power Supply Rejection Ratio (VCC = 5.0 V to 10 V)
PSRR
Output Source Current (VO = 1.5 V)
ISource
Output Voltage Swing
High State (ISource = 0 µA)
Low State (ISink = 500 µA)
VOH
VOL
NOTE: 1. Tlow = 0°C for MC34129
–40°C for MC33129
Thigh = +70°C for MC34129
+85°C for MC33129
65
500
65
40
1.75
Typ
1.250
2.500
2.0
10
1.0
3.0
1.5
10
25
0.5 to 5.5
87
750
85
80
1.96
0.1
Max Unit
1.275
2.625
1.300
2.750
12
50
12
25
V
V
mV
mV
mV
10
– nA
nA
200
–V
– dB
– kHz
– dB
µA
V
2.25
0.15
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33129
Description (MC33129 / MC34129) High Performance Current Mode Controller
Maker Motorola
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MC33129 Datasheet PDF






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