Features: • Output Switch Current in Excess of 5.0 A
• Fixed Frequency Oscillator (72 kHz) with OnChip Timing
• Provides 5.05 V Output without External Resistor Divider
• Precision 2% Reference
• 0% to 95% Output Duty Cycle
• CyclebyCycle 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 5Lead TO220 Package with Two Optional Leadforms
• Also Available in Surface Mount D2PAK Package
• Moisture Sensitivity Level (MSL) Equals 1
Specifications
|
Rating |
Symbol |
Value |
Unit |
| Power Supply Input Voltage |
VCC |
40 |
V |
| Switch Output Voltage Range |
VO(switch) |
2.0 to + Vin |
V |
| Voltage Feedback and Compensation Input Voltage Range |
VFB, VComp |
1.0 to + 7.0 |
V |
Power Dissipation
Case 314A, 314B and 314D (TA = +25)
Thermal Resistance, JunctiontoAmbient
Thermal Resistance, JunctiontoCase
Case 936A (D2PAK) (TA = +25)
Thermal Resistance, JunctiontoAmbient
Thermal Resistance, JunctiontoCase |
PD
JA
JC
PD
JA
JC |
Internally Limited
65
5.0
Internally Limited
70
5.0 |
W
/W
/W
W
/W
/W |
| Operating Junction Temperature |
TJ |
+150 |
|
Operating Ambient Temperature (Note 3.)
MC34167
MC34167 |
TA |
0 to + 70
40 to + 85 |
|
| Storage Temperature Range |
Tstg |
65 to +150 |
|
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 MILSTD883, Method 3015. Machine Model Method 200 V.
3. Tlow = 0 for MC34167 Thigh = + 70 for MC34167 = 40 for MC33167 = + 85 for MC33167
DescriptionThe MC34167, MC33167 series are high performance fixed frequency power switching regulators that contain the primary functions required for dctodc converters. This series was specifically designed to be incorporated in stepdown and voltageinverting configurations with a minimum number of external components and can also be used cost effectively in stepup applications.
The MC34167, MC33167 series consist of an internal temperature compensated reference, fixed frequency oscillator with onchip timing components, latching pulse width modulator for single pulse metering, high gain error amplifier, and a high current output switch.
Protective features of The MC34167, MC33167 series consist of cyclebycycle current limiting, undervoltage lockout, and thermal shutdown. Also included is a low power standby mode that reduces power supply current to 36 mA.
23810 Data Sheet
