MC33680FTBR2

Series: -
Output Type: Adjustable
PWM Type: -
Operating Temperature: 0°C ~ 70°C
Mounting Type: Surface Mount
Type: Step-Up (Boost)
Synchronous Rectifier: Yes
Number of Outputs: 2
Current - Output: 200mA
Packaging: Tape & Reel (TR)
Manufacturer: ON Semiconductor
Package / Case: 32-LQFP
Voltage - Output: 2.7 V ~ 5 V, 5 V ~ 25 V
Voltage - Input: 1 V ~ 7 V
Frequency - Switching: 100kHz, 120kHz
Supplier Device Package: 32-LQFP (7x7)


Features:

• Low Input Voltage, 1V up
• Low Quiescent Current in Standby Mode: 35mA typical
• PFM and Synchronous Rectification to ensure high efficiency (87% @60mA Load)
• Adjustable Main Output: +2.7V to +5V nominal 3.3V @ 100mA max, with 1.8V input
• Auxiliary Output Voltage: +5V to +25V +5V @ 25mA max, with 1.8V input +25V @ 15mA max, with 1.8V input
• Current Limit Protection
• PowerGood Signal with Programmable Delay
• Battery Low Detection
• Lithium Battery or Supercap Backup
• 32Pin LQFP Package

Application

• Digital Organizer and Dictionary
• Dual Output Power Supply (For MPU, Logic, Memory, LCD)
• Handheld Battery Powered Device (12 AA/AAA cell)

Pinout




Specifications

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

Description

The MC33680 is a dual DCDC regulator designed for electronic organizer applications. 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 of MC33680 can be adjusted from +5V to +25V by an external potentiometer.

The MC33680 has been designed for battery powered handheld products. With the low startup voltage from 1V and the low quiescent current (typical 35 mA); the MC33680 is best suited to operate from 1 to 2 AA/ AAA cell. Moreover, supervisory functions such as low battery detection, CPU PowerGood signal, and backup battery control, for lithium battery or supercap are also included in the chip.

Parameters:

Technical/Catalog Information	MC33680FTBR2
Vendor	ON Semiconductor (VA)
Category	Integrated Circuits (ICs)
Type	Step-Up (Boost)
Number of Outputs	2
Voltage - Input	1 ~ 7 V
Voltage - Output	2.7 ~ 5 V, 5 ~ 25 V
Current - Output	200mA
Power - Output	-
Package / Case	32-LQFP
Packaging	Cut Tape (CT)
Internal Switch(s)	Yes
Synchronous	Yes
Rds (On)	-
Operating Temperature	0°C ~ 70°C
Frequency - Switching	100kHz, 120kHz
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	MC33680FTBR2 MC33680FTBR2 MC33680FTBR2OSCT ND MC33680FTBR2OSCTND MC33680FTBR2OSCT