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零件编号 | MC33166 | ||
描述 | POWER SWITCHING REGULATORS | ||
制造商 | Motorola Semiconductors | ||
LOGO | |||
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Order this document by MC34166/D
Power Switching Regulators
MC34166
MC33166
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 D2PAK Package
POWER SWITCHING
REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
TH SUFFIX
PLASTIC PACKAGE
CASE 314A
1
5
1
5
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
Heatsink surface connected to Pin 3.
T SUFFIX
PLASTIC PACKAGE
CASE 314D
1
5
Simplified Block Diagram
(Step Down Application)
ILIMIT
Vin
4
Oscillator
PWM
Thermal
S
Q
R
UVLO
Reference
2
EA
1
35
This device contains 143 active transistors.
L
VO
5.05 V/3.0 A
Pin 1. Voltage Feedback Input
2. Switch Output
3. Ground
4. Input Voltage/VCC
5. Compensation/Standby
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
1 (D2PAK)
5
Heatsink surface (shown as terminal 6
in case outline drawing) is connected to Pin 3.
ORDERING INFORMATION
Operating
Device Temperature Range Package
MC33166D2T
Surface Mount
MC33166T TA = – 40° to + 85°C Straight Lead
MC33166TH
Horiz. Mount
MC33166TV
Vertical Mount
MC34166D2T
Surface Mount
MC34166T
MC34166TH
TA = 0° to + 70°C Straight Lead
Horiz. Mount
MC34166TV
Vertical Mount
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 4
1
+
Oscillator
PWM
MC34166 MC33166
Figure 18. Step–Down Converter
Vin
12 V
ILIMIT
S
Q
R
UVLO
4
+ Cin
330
Q1
2
D1
1N5822
Thermal
3
Reference
+
EA
+
1
L
190 µH
R2
6.8 k CO +
2200
VO
5.05 V/3.0 A
5 CF RF
0.1 68 k
R1
Test
Conditions
Results
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Vin = 8.0 V to 36 V, IO = 3.0 A
Vin = 12 V, IO = 0.25 A to 3.0 A
Vin = 12 V, IO = 3.0 A
Vin = 12 V, RL = 0.1 Ω
Vin = 12 V, IO = 3.0 A
5.0 mV = ± 0.05%
2.0 mV = ± 0.02%
10 mVpp
4.3 A
82.8%
L = Coilcraft M1496–A or General Magnetics Technology GMT–0223, 42 turns of #16 AWG on
Magnetics Inc. 58350–A2 core. Heatsink = AAVID Engineering Inc. 5903B, or 5930B.
The Step–Down Converter application is shown in Figure 18. The output switch transistor Q1 interrupts the input voltage, generating a squarewave at the LCO filter
input. The filter averages the squarewaves, producing a dc output voltage that can be set to any level between Vin and Vref by controlling the percent conduction
time of Q1 to that of the total oscillator cycle time. If the converter design requires an output voltage greater than 5.05 V, resistor R1 must be added to form a divider
network at the feedback input.
Figure 19. Step–Down Converter Printed Circuit Board and Component Layout
3.0″
(Bottom View)
8
VO
–+
+ Vin –
+
ÉÉÉÉÉÉÉÉÉÉÉÉRFÉÉÉÉÉÉRÉÉÉÉÉÉ1 CFÉÉÉÉÉÉ
+
(Top View)
MOTOROLA ANALOG IC DEVICE DATA
MC34166 MC33166
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 314D–03
–Q
–
U
B
A
1234 5
K
S
–T
SEATING
PLANE
–
C
E
L
G
D 5 PL
0.356 (0.014) M T Q M
J
H
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION D DOES NOT INCLUDE
INTERCONNECT BAR (DAMBAR) PROTRUSION.
DIMENSION D INCLUDING PROTRUSION SHALL
NOT EXCEED 10.92 (0.043) MAXIMUM.
INCHES
MILLIMETERS
DIM MIN MAX MIN MAX
A 0.572 0.613 14.529 15.570
B 0.390 0.415 9.906 10.541
C 0.170 0.180 4.318 4.572
D 0.025 0.038 0.635 0.965
E 0.048 0.055 1.219 1.397
G 0.067 BSC
1.702 BSC
H 0.087 0.112 2.210 2.845
J 0.015 0.025 0.381 0.635
K 1.020 1.065 25.908 27.051
L 0.320 0.365 8.128 9.271
Q 0.140 0.153 3.556 3.886
U 0.105 0.117 2.667 2.972
S 0.543 0.582 13.792 14.783
K
B
A
1 23 45
D
0.010 (0.254) M T
G
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A–02
(D2PAK)
OPTIONA
L
CEHAMFE
R
–T
–
TERMINAL 6
U
S
V
H
M
L
P
N
R
C
NOTES:
1 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2 CONTROLLING DIMENSION: INCH.
3 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
4 DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 6.
5 DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED
0.025 (0.635) MAXIMUM.
INCHES
MILLIMETERS
DIM MIN MAX MIN MAX
A 0.386 0.403 9.804 10.236
B 0.356 0.368 9.042 9.347
C 0.170 0.180 4.318 4.572
D 0.026 0.036 0.660 0.914
E 0.045 0.055 1.143 1.397
G 0.067 BSC
1.702 BSC
H 0.539 0.579 13.691 14.707
K 0.050 REF
1.270 REF
L 0.000 0.010 0.000 0.254
M 0.088 0.102 2.235 2.591
N 0.018 0.026 0.457 0.660
P 0.058 0.078 1.473 1.981
R 5_REF
5_ REF
S 0.116 REF
2.946 REF
U 0.200 MIN
5.080 MIN
V 0.250 MIN
6.350 MIN
How to reach us:
USA / EUROPE / Locations Not Listed: Motorola Literature Distribution;
P.O. Box 5405, Denver, Colorado 80217. 303–675–2140 or 1–800–441–2447
Mfax is a trademark of Motorola, Inc.
JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1,
Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. 81–3–5487–8488
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
– US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
INTERNET: http://motorola.com/sps
16 ◊
MOTOROLA ANALOG IC DEVIMCCE34D1A6T6A/D
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页数 | 16 页 | ||
下载 | [ MC33166.PDF 数据手册 ] |
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