Motorola Corp MC33166T

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Item Description: IC REG BUCK BOOST INV ADJ TO220

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Motorola Corp 9207
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

Semiconductor Components Industries, LLC, 2002
January, 2002 – Rev. 6
1 Publication Order Number:
MC34166/D
MC34166, MC33166
3.0 A, Step-Up/Down/
Inverting Switching
Regulators
The MC34166, MC33166 series are high performance fixed
frequency power switching regulators that contain the primary
functions required for dc–to–dc converters. This series was
specifically designed to be incorporated in step–down and
voltage–inverting configurations with a minimum number of external
components and can also be used cost effectively in step–up
applications.
These devices consist of an internal temperature compensated
reference, fixed frequency oscillator with on–chip timing components,
latching pulse width modulator for single pulse metering, high gain
error amplifier, and a high current output switch.
Protective features consist of cycle–by–cycle current limiting,
undervoltage lockout, and thermal shutdown. Also included is a low
power standby mode that reduces power supply current to 36 µA.
Output Switch Current in Excess of 3.0 A
Fixed Frequency Oscillator (72 kHz) with On–Chip Timing
Provides 5.05 V Output without External Resistor Divider
Precision 2% Reference
0% to 95% Output Duty Cycle
Cycle–by–Cycle Current Limiting
Undervoltage Lockout with Hysteresis
Internal Thermal Shutdown
Operation from 7.5 V to 40 V
Standby Mode Reduces Power Supply Current to 36 µA
Economical 5–Lead TO–220 Package with Two Optional Leadforms
Also Available in Surface Mount D
2
PAK Package
Moisture Sensitivity Level (MSL) Equals 1
Figure 1. Simplified Block Diagram
(Step Down Application)
EA
V
O
I
LIMIT
V
in
4
2
S
Q
R
UVLO
3
5
L
5.05 V/
3.0 A
Reference
Thermal
PWM
Oscillator
1
This device contains 143 active transistors.
http://onsemi.com
TO–220
TH SUFFIX
CASE 314A
See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.
ORDERING INFORMATION
1
5
MARKING
DIAGRAMS
1
5
TO–220
TV SUFFIX
CASE 314B
1
5
Heatsink surface connected to Pin 3
TO–220
T SUFFIX
CASE 314D
Pin 1. Voltage Feedback Input
2. Switch Output
3. Ground
4. Input Voltage/V
CC
5. Compensation/Standby
D
2
PAK
D2T SUFFIX
CASE 936A
Heatsink surface (shown as
terminal 6 in case outline
drawing) is connected to Pin 3
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
MC
3x166T
AWLYWW
MC
3x166T
AWLYWW
MC
3x166T
AWLYWW
1
5
MC
3x166T
AWLYWW
15
MC34166, MC33166
http://onsemi.com
2
MAXIMUM RATINGS (Note 2)
Rating
Symbol Value Unit
Power Supply Input Voltage V
CC
40 V
Switch Output Voltage Range V
O(switch)
–1.5 to + V
in
V
Voltage Feedback and Compensation Input Voltage Range V
FB,
V
Comp
–1.0 to + 7.0 V
Power Dissipation
Case 314A, 314B and 314D (T
A
= +25°C) P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient θ
JA
65 °C/W
Thermal Resistance, Junction–to–Case θ
JC
5.0 °C/W
Case 936A (D
2
PAK) (T
A
= +25°C) P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient θ
JA
70 °C/W
Thermal Resistance, Junction–to–Case θ
JC
5.0 °C/W
Operating Junction Temperature T
J
+150 °C
Operating Ambient Temperature (Note 3)
MC34166
MC33166
T
A
0 to + 70
– 40 to + 85
°C
Storage Temperature Range T
stg
– 65 to +150 °C
1. Maximum package power dissipation limits must be observed to prevent thermal shutdown activation.
2. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL–STD–883, Method 3015.
Machine Model Method 200 V.
3. T
low
=0°C for MC34166 T
high
= + 70°C for MC34166
=–40°C for MC33166 = + 85°C for MC33166
MC34166, MC33166
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (V
CC
= 12 V, for typical values T
A
= +25°C, for min/max values T
A
is the operating ambient
temperature range that applies [Notes 4, 5], unless otherwise noted.)
Characteristic
Symbol Min Typ Max Unit
OSCILLATOR
Frequency (V
CC
= 7.5 V to 40 V) T
A
= +25°C
T
A
= T
low
to T
high
f
OSC
65
62
72
79
81
kHz
ERROR AMPLIFIER
Voltage Feedback Input Threshold T
A
= +25°C
T
A
= T
low
to T
high
V
FB(th)
4.95
4.85
5.05
5.15
5.2
V
Line Regulation (V
CC
= 7.5 V to 40 V, T
A
= +25°C) Reg
line
0.03 0.078 %/V
Input Bias Current (V
FB
= V
FB(th)
+ 0.15 V) I
IB
0.15 1.0 µA
Power Supply Rejection Ratio (V
CC
= 10 V to 20 V, f = 120 Hz) PSRR 60 80 dB
Output Voltage Swing
High State (I
Source
= 75 µA, V
FB
= 4.5 V)
Low State (I
Sink
= 0.4 mA, V
FB
= 5.5 V)
V
OH
V
OL
4.2
4.9
1.6
1.9
V
PWM COMPARATOR
Duty Cycle
Maximum (V
FB
= 0 V)
Minimum (V
Comp
= 1.9 V)
DC
(max)
DC
(min)
92
0
95
0
100
0
%
SWITCH OUTPUT
Output Voltage Source Saturation (V
CC
= 7.5 V, I
Source
= 3.0 A) V
sat
(V
CC
–1.5)
(V
CC
–1.8)
V
Off–State Leakage (V
CC
= 40 V, Pin 2 = Gnd) I
sw(off)
0 100 µA
Current Limit Threshold I
pk(switch)
3.3 4.3 6.0 A
Switching Times (V
CC
= 40 V, I
pk
= 3.0 A, L = 375 µH, T
A
= +25°C)
Output Voltage Rise Time
Output Voltage Fall Time
t
r
t
f
100
50
200
100
ns
UNDERVOLTAGE LOCKOUT
Startup Threshold (V
CC
Increasing, T
A
= +25°C) V
th(UVLO)
5.5 5.9 6.3 V
Hysteresis (V
CC
Decreasing, T
A
= +25°C) V
H(UVLO)
0.6 0.9 1.2 V
TOTAL DEVICE
Power Supply Current (T
A
= +25°C )
Standby (V
CC
= 12 V, V
Comp
< 0.15 V)
Operating (V
CC
= 40 V, Pin 1 = Gnd for maximum duty cycle)
I
CC
36
31
100
55
µA
mA
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
5. T
low
=0°C for MC34166 T
high
= + 70°C for MC34166
=–40°C for MC33166 = + 85°C for MC33166
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