Order this document by MC34163/D
Power Switching Regulators
The MC34163 series are monolithic power switching regulators that
contain the primary functions required for dc–to–dc converters. This series is
specifically designed to be incorporated in step–up, step–down, and
voltage–inverting applications with a minimum number of external
components.
These devices consist of two high gain voltage feedback comparators,
temperature compensated reference, controlled duty cycle oscillator, driver
with bootstrap capability for increased efficiency, and a high current output
switch. Protective features consist of cycle–by–cycle current limiting, and
internal thermal shutdown. Also included is a low voltage indicator output
designed to interface with microprocessor based systems.
These devices are contained in a 16 pin dual–in–line heat tab plastic
package for improved thermal conduction.
•
Output Switch Current in Excess of 3.0 A
MC34163
MC33163
POWER SWITCHING
REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
•
•
•
•
•
•
•
•
•
16
1
Operation from 2.5 V to 40 V Input
Low Standby Current
Precision 2% Reference
Controlled Duty Cycle Oscillator
Driver with Bootstrap Capability for Increased Efficiency
Cycle–by–Cycle Current Limiting
Internal Thermal Shutdown Protection
Low Voltage Indicator Output for Direct Microprocessor Interface
Heat Tab Power Package
P SUFFIX
PLASTIC PACKAGE
CASE 648C
(DIP–16)
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SOP–16L)
Representative Block Diagram
Driver
Collector
PIN CONNECTIONS
9
LVI Output
Voltage Feedback 2
10
Voltage Feedback 1
Switch
Collector
11
Gnd
5
Timing Capacitor
6
7
8
(Top View)
Switch
Emitter
15
Device
16
Bootstrap
Input
MC34163DW
MC34163P
MC33163DW
MC33163P
TA = – 40° to +85°C
12
11
10
Switch Collector
1
2
3
4
16 Bootstrap Input
15
14
13
Gnd
Switch
Emitter
Ipk Sense
8
–
+
ILimit
VCC
Timing
Capacitor
7
+
6
OSC
5
Gnd
4
Voltage
Feedback 1
Voltage
Feedback 2
LVI Output
3
Control Logic
and Thermal
Shutdown
+
12
Gnd
13
14
VCC
Ipk Sense
9 Driver Collector
2
LVI
1
+
+
–
+
+
–
VFB
ORDERING INFORMATION
Operating
Temperature Range
TA = 0° to +70°C
Package
SOP–16L
DIP–16
SOP–16L
DIP–16
Rev 2
+
(Bottom View)
This device contains 114 active transistors.
©
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
MC34163 MC33163
MAXIMUM RATINGS
Rating
Power Supply Voltage
Switch Collector Voltage Range
Switch Emitter Voltage Range
Switch Collector to Emitter Voltage
Switch Current (Note 1)
Driver Collector Voltage
Driver Collector Current
Bootstrap Input Current Range (Note 1)
Current Sense Input Voltage Range
Feedback and Timing Capacitor Input
Voltage Range
Low Voltage Indicator Output Voltage
Range
Low Voltage Indicator Output Sink Current
Thermal Characteristics
P Suffix, Dual–In–Line Case 648C
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
(Pins 4, 5, 12, 13)
DW Suffix, Surface Mount Case 751G
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
(Pins 4, 5, 12, 13)
Operating Junction Temperature
Operating Ambient Temperature (Note 3)
MC34163
MC33163
Storage Temperature Range
Symbol
VCC
VC(switch)
VE(switch)
VCE(switch)
ISW
VC(driver)
IC(driver)
IBS
Value
40
–1.0 to + 40
– 2.0 to VC(switch)
40
3.4
–1.0 to +40
150
–100 to +100
Unit
V
V
V
V
A
V
mA
mA
V
V
V
mA
°C/W
R
θJA
R
θJC
R
θJA
R
θJC
TJ
TA
0 to +70
– 40 to + 85
Tstg
– 65 to +150
°C
80
15
VIpk (Sense) (VCC–7.0) to (VCC+1.0)
Vin
VC(LVI)
IC(LVI)
–1.0 to + 7.0
–1.0 to + 40
10
94
18
+150
°C
°C
ELECTRICAL CHARACTERISTICS
(VCC = 15 V, Pin 16 = VCC, CT = 620 pF, for typical values TA = 25°C, for min/max values TA is
the operating ambient temperature range that applies (Note 3), unless otherwise noted.)
Characteristic
OSCILLATOR
Frequency
TA = 25°C
Total Variation over VCC = 2.5 V to 40 V, and Temperature
Charge Current
Discharge Current
Charge to Discharge Current Ratio
Sawtooth Peak Voltage
Sawtooth Valley Voltage
FEEDBACK COMPARATOR 1
Threshold Voltage
TA = 25°C
Line Regulation (VCC = 2.5 V to 40 V, TA = 25°C)
Total Variation over Line, and Temperature
Input Bias Current (VFB1 = 5.05 V)
Vth(FB1)
4.9
–
4.85
IIB(FB1)
–
5.05
0.008
–
100
5.2
0.03
5.25
200
V
%/V
V
µA
fOSC
46
45
Ichg
Idischg
Ichg/Idischg
VOSC(P)
VOSC(V)
–
–
8.0
–
–
50
–
225
25
9.0
1.25
0.55
54
55
–
–
10
–
–
µA
µA
–
V
V
kHz
Symbol
Min
Typ
Max
Unit
NOTES:
1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. Tlow = 0
°
C for MC34163
Thigh = + 70
°
C for MC34163
= – 40
°
C for MC33163
= + 85
°
C for MC33163
2
MOTOROLA ANALOG IC DEVICE DATA
MC34163 MC33163
ELECTRICAL CHARACTERISTICS
(continued)
(VCC = 15 V, Pin 16 = VCC, CT = 620 pF, for typical values TA = 25°C, for min/max
values TA is the operating ambient temperature range that applies (Note 3), unless otherwise noted.)
Characteristic
FEEDBACK COMPARATOR 2
Threshold Voltage
TA = 25°C
Line Regulation (VCC = 2.5 V to 40 V, TA = 25°C)
Total Variation over Line, and Temperature
Input Bias Current (VFB2 = 1.25 V)
CURRENT LIMIT COMPARATOR
Threshold Voltage
TA = 25°C
Total Variation over VCC = 2.5 V to 40 V, and Temperature
Input Bias Current (VIpk (Sense) = 15 V)
DRIVER AND OUTPUT SWITCH
(Note 2)
Sink Saturation Voltage (ISW = 2.5 A, Pins 14, 15 grounded)
Non–Darlington Connection (RPin 9 = 110
Ω
to VCC, ISW/IDRV
≈
20)
Darlington Connection (Pins 9, 10, 11 connected)
Collector Off–State Leakage Current (VCE = 40 V)
Bootstrap Input Current Source (VBS = VCC + 5.0 V)
Bootstrap Input Zener Clamp Voltage (IZ = 25 mA)
LOW VOLTAGE INDICATOR
Input Threshold (VFB2 Increasing)
Input Hysteresis (VFB2 Decreasing)
Output Sink Saturation Voltage (Isink = 2.0 mA)
Output Off–State Leakage Current (VOH = 15 V)
TOTAL DEVICE
Standby Supply Current (VCC = 2.5 V to 40 V, Pin 8 = VCC,
Pins 6, 14, 15 = Gnd, remaining pins open)
ICC
–
6.0
10
mA
Vth
VH
VOL(LVI)
IOH
1.07
–
–
–
1.125
15
0.15
0.01
1.18
–
0.4
5.0
V
mV
V
µA
VCE(sat)
–
–
IC(off)
Isource(DRV)
VZ
–
0.5
VCC + 6.0
0.6
1.0
0.02
2.0
VCC + 7.0
1.0
1.4
100
4.0
VCC + 9.0
µA
mA
V
V
Vth(Ipk Sense)
–
230
IIB(sense)
–
250
–
1.0
–
270
20
µA
mV
Vth(FB2)
1.225
–
1.213
IIB(FB2)
– 0.4
1.25
0.008
–
0
1.275
0.03
1.287
0.4
V
%/V
V
µA
Symbol
Min
Typ
Max
Unit
NOTES:
1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. Tlow = 0°C for MC34163
Thigh = + 70°C for MC34163
= – 40°C for MC33163
= + 85°C for MC33163
100
∆
f OSC, OSCILLATOR FREQUENCY CHANGE (%)
t on –t off , OUTPUT SWITCH ON–OFF TIME (
µ
s)
Figure 1. Output Switch On–Off Time
versus Oscillator Timing Capacitor
VCC = 15 V
TA = 25°C
1) ton, RDT =
∞
2) ton, RDT = 20 k
3) ton, toff, RDT = 10 k
4) toff, RDT = 20 k
5) toff, RDT =
∞
Figure 2. Oscillator Frequency Change
versus Temperature
2.0
VCC = 15 V
CT = 620 pF
0
1
2
3
4
5
10
– 2.0
– 4.0
1.0
0.1
1.0
CT, OSCILLATOR TIMING CAPACITOR (nF)
10
– 6.0
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
MOTOROLA ANALOG IC DEVICE DATA
3
MC34163 MC33163
V th(FB2), COMPARATOR 2 THRESHOLD VOLTAGE (mV)
Figure 3. Feedback Comparator 1 Input Bias
Current versus Temperature
140
IIB , INPUT BIAS CURRENT (
µ
A)
VCC = 15 V
VFB1 = 5.05 V
120
Figure 4. Feedback Comparator 2 Threshold
Voltage versus Temperature
1300
1280
1260
1240
Vth Min = 1225 mV
1220
1200
– 55
VCC = 15 V
Vth Max = 1275 mV
100
Vth Typ = 1250 mV
80
60
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
I source (DRV) , BOOTSTRAP INPUT CURRENT SOURCE (mA)
V Z, BOOTSTRAP INPUT ZENER CLAMP VOLTAGE (V)
Figure 5. Bootstrap Input Current
Source versus Temperature
2.8
VCC = 15 V
Pin 16 = VCC + 5.0 V
Figure 6. Bootstrap Input Zener Clamp
Voltage versus Temperature
7.6
IZ = 25 mA
7.4
2.4
2.0
7.2
1.6
7.0
1.2
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
6.8
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
Figure 7. Output Switch Source Saturation
versus Emitter Current
0
VCE (sat), SOURCE SATURATION (V)
VCE (sat), SINK SATURATION (V)
VCC
– 0.4
– 0.8
–1.2
–1.6
– 2.0
Darlington Configuration
Emitter Sourcing Current to Gnd
Pins 7, 8, 10, 11 = VCC
Pins 4, 5, 12, 13 = Gnd
TA = 25°C, (Note 2)
1.2
1.0
0.8
0.6
0.4
0.2
0
Figure 8. Output Switch Sink Saturation
versus Collector Current
Darlington, Pins 9, 10, 11 Connected
Bootstrapped, Pin 16 = VCC + 5.0 V
Non–Bootstrapped, Pin 16 = VCC
0
0.8
2.4
1.6
IE, EMITTER CURRENT (A)
3.2
Grounded Emitter Configuration
Collector Sinking Current From VCC
Pins 7, 8 = VCC = 15 V
Pins 4, 5, 12, 13, 14, 15 = Gnd
TA = 25°C, (Note 2)
Saturated Switch, RPin9 = 110
Ω
to VCC
Gnd
0
0.8
1.6
2.4
IC, COLLECTOR CURRENT (A)
3.2
4
MOTOROLA ANALOG IC DEVICE DATA
MC34163 MC33163
Figure 9. Output Switch Negative Emitter
Voltage versus Temperature
0
Gnd
V E , EMITTER VOLTAGE (V)
– 0.4
– 0.8
– 1.2
– 1.6
– 2.0
– 55
IC = 10 mA
VCC = 15 V
Pins 7, 8, 9, 10, 16 = VCC
Pins 4, 6 = Gnd
Pin 14 Driven Negative
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
IC = 10
µA
V OL (LVI) , OUTPUT SATURATION VOLTAGE (V)
Figure 10. Low Voltage Indicator Output Sink
Saturation Voltage versus Sink Current
0.5
0.4
0.3
0.2
0.1
0
VCC = 5 V
TA = 25°C
0
2.0
4.0
6.0
Isink, OUTPUT SINK CURRENT (mA)
8.0
Figure 11. Current Limit Comparator Threshold
Voltage versus Temperature
V th (Ipk Sense) , THRESHOLD VOLTAGE (mV)
254
IIB (Sense), INPUT BIAS CURRENT (
µ
A)
VCC = 15 V
1.6
1.4
1.2
1.0
0.8
Figure 12. Current Limit Comparator Input Bias
Current versus Temperature
VCC = 15 V
VIpk (Sense) = 15 V
252
250
248
246
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
0.6
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
Figure 13. Standby Supply Current
versus Supply Voltage
8.0
I CC, SUPPLY CURRENT (mA)
I CC, SUPPLY CURRENT (mA)
7.2
Figure 14. Standby Supply Current
versus Temperature
VCC = 15 V
Pins 7, 8, 16 = VCC
Pins 4, 6, 14 = Gnd
Remaining Pins Open
6.0
6.4
4.0
Pins 7, 8, 16 = VCC
Pins 4, 6, 14 = Gnd
Remaining Pins Open
TA = 25°C
0
10
20
30
VCC, SUPPLY VOLTAGE (V)
40
5.6
2.0
4.8
0
4.0
– 55
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
MOTOROLA ANALOG IC DEVICE DATA
5
