MC34280FTB, MC34280FTBR2, MC34284 Selling Leads, Datasheet
MFG:ON Package Cooled:QFP D/C:00+
MC34280FTB, MC34280FTBR2, MC34284 Datasheet download
Part Number: MC34280FTB
MFG: ON
Package Cooled: QFP
D/C: 00+
MC34280FTB, MC34280FTBR2, MC34284
- Table of contents:
Info of MC34280FTB
Info of MC34280FTBR2
Info of MC34284
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About MC34280FTB
PDF/DataSheet Download
Datasheet: MC34280FTB
File Size: 241808 KB
Manufacturer: ONSEMI [ON Semiconductor]
Download : Click here to Download
About MC34280FTBR2
PDF/DataSheet Download
Datasheet: MC34280FTBR2
File Size: 389822 KB
Manufacturer: ONSEMI [ON Semiconductor]
Download : Click here to Download
About MC306
PDF/DataSheet Download
Datasheet: MC306
File Size: 28737 KB
Manufacturer: ETC [ETC]
Download : Click here to Download
MC34280FTB Maximum Ratings
| Symbol | Parameter | Value | Unit |
| vcc | DC Supply Voltage (Referenced to GND) | 0.5 to +7.0 | V |
| VIN | DC Input Voltage (Referenced to GND) | 0.5 to VCC + 0.5 | V |
| VOUT | DC Output Voltage (Referenced to GND) | 0.5 to VCC + 0.5 | V |
| LIN | DC Input Current, per Pin | ±20 | mA |
| IOUT | DC Onput Current, per Pin | ±25 | mA |
| ICC | DC Supply Current Per Supply Pin | ±50 | mA |
| PD | Power dissipation in still air piastic DIP SOIC package |
750 500 |
mW |
| TSTG | Storage Temperature | 65 to +150 | °C |
| TL | Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) |
260 | °C |
Functional operation should be restricted to the Recommended Operating Conditions.
?Derating - Plastic DIP: 10 mW/ from 65to 125
Ceramic DIP: 10 mW/ from 100 to 125
SOIC Package: 7 mW/ from 65 to 125
For high frequency or heavy load considerations, see Chapter 2 of the Motorola HighSpeed CMOS Data Book (DL129/D).
MC34280FTB Features
• Low Input Voltage, 1V up
• Low Quiescent Current in Standby Mode: 35mA typical
• PFM and Synchronous Rectification to ensure high efficiency (87% @200mA Load)
• Adjustable Main Output: nominal 3.3V @ 200mA max, with 1.8V input
• Auxiliary Output Voltage can be digitally controlled by microprocessor
• Auxiliary Output Voltage:
+5V @ 25mA max, with 1.8V input
+25V @ 15mA max, with 1.8V input
• Current Limit Protection
• PowerON Reset Signal with Programmable Delay
• Battery Low Detection
• Lithium Battery Backup
• 32Pin LQFP Package
MC34280FTB Typical Application
• Digital Organizer and Dictionary
• Personal Digital Assistance (PDA)
• Dual Output Power Supply (For MPU, Logic, Memory, LCD)
• Handheld Battery Powered Device (12 AA/AAA cell)
MC34280FTB Connection Diagram
MC34280FTBR2 General Description
The MC34280 is a power supply integrated circuit which provides two boost regulated outputs and some power management supervisory functions. Both regulators apply PulseFrequencyModulation (PFM). The main stepup regulator output can be externally adjusted from 2.7V to 5V. An internal synchronous rectifier is used to ensure high efficiency (achieve 87%). The auxiliary regulator with a builtin power transistor can be configured to produce a wide range of positive voltage (can be used for LCD contrast voltage). This voltage can be adjusted from +5V to +25V by an external potentiometer; or by a microprocessor, digitally through a 6bit internal DAC.
The MC34280 has been designed for battery powered handheld products. With the low startup voltage from 1V and the low quiescent current (typical 35 mA); the MC34280 is best suited to operate from 1 to 2 AA/ AAA cell. Moreover, supervisory functions such as low battery detection, CPU poweron reset, and backup battery control, are also included in the chip. It makes the MC34280 the best onechip power management solution for applications such as electronic organizers and PDAs.
MC34280FTBR2 Maximum Ratings
|
Parameter |
Symbol |
Min |
Max |
Unit |
| Power Supply Voltage Digital Pin Voltage General Analog Pin Voltage Pin VAUXSW to Pin VAUXEMR Voltage (Continuous) |
VBAT Vdigital Vanalog VAUXCE |
-0.3 -0.3 -0.3 -0.3 |
7.0 7.0 7.0 30 |
Vdc Vdc Vdc Vdc |
| pin VMAINSW to Pin VMAIN Voltage (Continuous) |
Vsyn |
0.3 |
Vdc | |
| Operating Junction Temperature |
Tj(max) |
150 |
||
| Ambient Operating Temperature |
Ta |
0 |
70 |
|
| Storage Temperature |
Tstg |
-50 |
150 |
MC34280FTBR2 Features
• Low Input Voltage, 1V up
• Low Quiescent Current in Standby Mode: 35mA typical
• PFM and Synchronous Rectification to ensure high efficiency (87% @200mA Load)
• Adjustable Main Output: nominal 3.3V @ 200mA max, with 1.8V input
• Auxiliary Output Voltage can be digitally controlled by microprocessor
• Auxiliary Output Voltage: +5V @ 25mA max, with 1.8V input +25V @ 15mA max, with 1.8V input
• Current Limit Protection
• PowerON Reset Signal with Programmable Delay
• Battery Low Detection
• Lithium Battery Backup
• 32Pin LQFP Package
MC34280FTBR2 Typical Application
• Digital Organizer and Dictionary
• Personal Digital Assistance (PDA)
• Dual Output Power Supply (For MPU, Logic, Memory, LCD)
• Handheld Battery Powered Device (12 AA/AAA cell)
MC34280FTBR2 Connection Diagram
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