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MC33680 데이터시트 PDF




ON Semiconductor에서 제조한 전자 부품 MC33680은 전자 산업 및 응용 분야에서
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부품번호 MC33680 기능
기능 Dual DC-DC Regulator
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MC33680 데이터시트, 핀배열, 회로
MC33680
Dual DC−DC Regulator for
Electronic Organizer
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 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 μA); 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.
FEATURES:
Low Input Voltage, 1V up
Low Quiescent Current in Standby Mode: 35μA typical
PFM and Synchronous Rectification to ensure high efficiency
(87% @60mA Load)
Adjustable Main Output: +2.7V to +5V
www.DataSheet4U.com
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
APPLICATIONS:
Digital Organizer and Dictionary
Dual Output Power Supply (For MPU, Logic, Memory, LCD)
Handheld Battery Powered Device (12 AA/AAA cell)
http://onsemi.com
32 1
32LEAD LQFP
FTB SUFFIX
CASE 873A
PIN CONNECTIONS &
DEVICE MARKING
VAUXSW
VAUXEMR
LIBATIN
LIBATOUT
NC
VMAINGND
VMAINSW
VMAIN
MC33680
FTB
AWLYYWW
NC
DGND
LIBATCL
LIBATON
LOWBATB
PORB
DGND
LOWBATSEN
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC33680FTB
LQFP 1250 Tray / Drypack
MC33680FTBR2 LQFP 1800 / Tape & Reel
© Semiconductor Components Industries, LLC, 2006
July, 2006 Rev. 4
1
Publication Order Number:
MC33680/D




MC33680 pdf, 반도체, 판매, 대치품
MC33680
PIN FUNCTION DESCRIPTION
Pin
No. Function
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1 VMAINFB
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2 VBAT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3 VBAT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ4 VDD
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5 PDELAY
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6 VREF
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ7 AGND
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ8 IREF
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ9 LOWBATSEN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ10 DGND
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ11 PORB
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ12 LOWBATB
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ13 LIBATON
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ14 LIBATCL
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ15 DGND
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ16 NC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ17 VAUXEN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ18 VAUXFBP
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ19 NC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ20 VAUXFBN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ21 VAUXBDV
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ22 VAUXCHG
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ23 VAUXBASE
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ24 NC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ25 VAUXSW
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ26 VAUXEMR
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ27 LIBATIN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ28 LIBATOUT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ29 NC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ30 VMAINGND
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ31 VMAINSW
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ32 VMAIN
Type/Direction
Analog / Input
Power
Power
Analog / Output
Analog / Input
Analog / Output
Analog Ground
Analog / Input
Analog / Input
Digital Ground
CMOS / Output
CMOS / Output
CMOS / Input
CMOS / Input
Digital Ground
CMOS / Input
Analog / Input
Analog / Input
Power
Analog / Output
Analog / Output
Analog / Output
Analog / Output
Analog / Input
Analog / Output
Power Ground
Analog / Input
Analog / Output
Description
Feedback pin for VMAIN
Main battery supply
Main battery supply
Connect to decoupling capacitor for internal logic supply
Capacitor connection for defining PowerOn signal delay
Bandgap Reference output voltage. Nominal voltage is 1.25V
Resistor connection for defining internal current bias and PDELAY current
Resistive network connection for defining low battery detect threshold
Active LOW PowerOn reset signal
Active LOW low battery detect output
microprocessor control signal for Lithium battery backup switch, the switch is
ON when LIBATON=HIGH and LIBATCL=HIGH
microprocessor control signal for Lithium battery backup switch, if it is HIGH,
the switch is controlled by LIBATON, otherwise, controlled by internal logic
no connection
VAUX enable, Active high
Feedback pin for VAUX
no connection
Feedback pin for VAUX
VAUX BJT base drive circuit power supply
test pin
test pin
no connection
Collector output of the VAUX power BJT
Emitter output of the VAUX power BJT
Lithium battery input for backup purposes
Lithium battery output
no connection
Ground for VMAIN low side switch
VMAIN inductor connection
VMAIN output
http://onsemi.com
4

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MC33680 전자부품, 판매, 대치품
MC33680
80%
75%
70%
65%
60% Vin = 3V
Vin = 1.8V
55%
Vin = 1.5V
Vin = 1V
50%
1 3 5 7 9 11 13 15
IOUT_AUX, AUX OUTPUT CURRENT (mA)
Figure 8. Efficiency of VAUX versus Output
Current (VAUX = 20 V, L2 = 33 uH, Various VIN)
80%
75%
70%
65%
60% Iout = 1mA
Iout = 5mA
55% Iout = 10mA
Iout = 15mA
50%
1 1.5 2 2.5 3
VIN, INPUT VOLTAGE (V)
Figure 9. Efficiency of VAUX versus Input
Voltage (VAUX = 20 V, L2 = 33 uH, Various IOUT)
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
1
Vin = 3V
Vin = 2.4V
Vin = 1.8V
Vin = 1.5V
Vin = 1V
5 10 15 20 25 30
IOUT_AUX, AUX OUTPUT CURRENT (mA)
35
Figure 10. Efficiency of VAUX versus Output
Current (VAUX = 5 V, L2 = 82 uH, Various VIN)
85%
80%
75%
70% Iout = 1V
Iout = 5V
Iout = 10V
65% Iout = 15V
Iout = 25V
50%
1 1.5 2 2.5 3
VIN, INPUT VOLTAGE (V)
Figure 11. Efficiency of VAUX versus Input
Voltage (VAUX = 5 V, L2 = 82 uH, Various IOUT)
http://onsemi.com
7

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