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MC33166 の電気的特性と機能

MC33166のメーカーはON Semiconductorです、この部品の機能は「(MC33166 / MC34166) Step-Up/Down/Inverting Switching Regulators」です。


製品の詳細 ( Datasheet PDF )

部品番号 MC33166
部品説明 (MC33166 / MC34166) Step-Up/Down/Inverting Switching Regulators
メーカ ON Semiconductor
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MC33166 Datasheet, MC33166 PDF,ピン配置, 機能
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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 mA.
Features
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 mA
Economical 5−Lead TO−220 Package with Two Optional Leadforms
Also Available in Surface Mount D2PAK Package
Moisture Sensitivity Level (MSL) Equals 1
Pb−Free Packages are Available
Vin
ILIMIT
4
Oscillator
PWM
S
Q
R
2
Thermal
UVLO
Reference
L
EA
1
VO
5.05 V/
3.0 A
35
This device contains 143 active transistors.
Figure 1. Simplified Block Diagram
(Step Down Application)
http://onsemi.com
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
MARKING
DIAGRAMS
1
5
TO−220
TH SUFFIX
CASE 314A
MC
3x166T
AWLYWWG
1
5
TO−220
TV SUFFIX
CASE 314B
MC
3x166T
AWLYWWG
Heatsink surface connected to Pin 3
TO−220
MC
T SUFFIX
3x166T
CASE 314D AWLYWWG
1
5
Pin 1. Voltage Feedback Input
2. Switch Output
3. Ground
4. Input Voltage/VCC
5. Compensation/Standby
1
5
D2PAK
D2T SUFFIX
CASE 936A
MC
3x166T
AWLYWWG
Heatsink surface (shown as
terminal 6 in case outline
1
drawing) is connected to Pin 3
5
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 7
1
Publication Order Number:
MC34166/D

1 Page





MC33166 pdf, ピン配列
MC34166, MC33166
ELECTRICAL CHARACTERISTICS (VCC = 12 V, for typical values TA = +25°C, for min/max values TA is the operating ambient
temperature range that applies [Notes 3, 4], unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max Unit
OSCILLATOR
Frequency (VCC = 7.5 V to 40 V)
TA = +25°C
TA = Tlow to Thigh
fOSC
65 72 79
62 − 81
ERROR AMPLIFIER
Voltage Feedback Input Threshold
TA = +25°C
TA = Tlow to Thigh
VFB(th)
4.95 5.05 5.15
4.85 −
5.2
Line Regulation (VCC = 7.5 V to 40 V, TA = +25°C)
Regline
− 0.03 0.078
Input Bias Current (VFB = VFB(th) + 0.15 V)
IIB − 0.15 1.0
Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz)
PSRR 60 80
Output Voltage Swing
High State (ISource = 75 mA, VFB = 4.5 V)
Low State (ISink = 0.4 mA, VFB = 5.5 V)
VOH
VOL
4.2 4.9
− 1.6 1.9
PWM COMPARATOR
Duty Cycle
Maximum (VFB = 0 V)
Minimum (VComp = 1.9 V)
DC(max)
DC(min)
92
0
95 100
00
SWITCH OUTPUT
Output Voltage Source Saturation (VCC = 7.5 V, ISource = 3.0 A)
Vsat
− (VCC −1.5) (VCC −1.8)
Off−State Leakage (VCC = 40 V, Pin 2 = GND)
Isw(off)
0 100
Current Limit Threshold
Ipk(switch)
3.3
4.3
6.0
Switching Times (VCC = 40 V, Ipk = 3.0 A, L = 375 mH, TA = +25°C)
Output Voltage Rise Time
Output Voltage Fall Time
tr
tf
− 100 200
− 50 100
UNDERVOLTAGE LOCKOUT
Startup Threshold (VCC Increasing, TA = +25°C)
Vth(UVLO)
5.5
5.9
6.3
Hysteresis (VCC Decreasing, TA = +25°C)
VH(UVLO)
0.6
0.9
1.2
TOTAL DEVICE
Power Supply Current (TA = +25°C )
Standby (VCC = 12 V, VComp < 0.15 V)
Operating (VCC = 40 V, Pin 1 = GND for maximum duty cycle)
ICC
− 36 100
− 31 55
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
4. Tlow = 0°C for MC34166
= − 40°C for MC33166
Thigh = + 70°C for MC34166
= + 85°C for MC33166
kHz
V
%/V
mA
dB
V
%
V
mA
A
ns
V
V
mA
mA
http://onsemi.com
3


3Pages


MC33166 電子部品, 半導体
+
CT
Oscillator
Pulse Width
Modulator
MC34166, MC33166
Current
Sense
S
Q
R
PWM Latch
Undervoltage
Lockout
Vin
4
Input Voltage/VCC
Cin
Switch
Output
2
Thermal
Shutdown
+
100 mA
5.05 V
Reference
Error
Amp
120
+ Voltage
Feedback
Input
1 R2
GND 3
Compensation 5 CF
RF
=
Sink Only
Positive True Logic
R1
Figure 14. MC34166 Representative Block Diagram
L
VO
CO
4.1 V
Timing Capacitor CT
Compensation
2.3 V
ON
Switch Output
OFF
Figure 15. Timing Diagram
http://onsemi.com
6

6 Page



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