MC34280 Datasheet, PDF (6/20 Pages) ON Semiconductor – Power Supply & Management IC for Handheld Electronic Products

MC34280
ABSOLUTE MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Parameter
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Power Supply Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{Digital Pin Voltage}
Symbol
VBAT
Vdigital
Min
Max
Unit
–0.3
7.0
Vdc
–0.3
7.0
Vdc
General Analog Pin Voltage
Vanalog
–0.3
7.0
Vdc
Pin VAUXSW to Pin VAUXEMR Voltage (Continuous)
VAUXCE
–0.3
30
Vdc
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Pin VMAINSW to Pin VMAIN Voltage (Continuous)
Vsyn
0.3
Vdc
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Operating Junction Temperature
Tj _(max)
150
°C
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Ambient Operating Temperature
Ta
0
70
°C
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Storage Temperature
Tstg
– 50
150
°C
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{STATIC ELECTRICAL CHARACTERISTICS (Circuit of Figure 1, VP = 1.8V, Iload = 0 mA, TA = 0 to 70°C unless}
otherwise noted.)
Rating
Operating Supply Voltage1
VMAIN output voltage
VMAIN output voltage range2
VMAIN output current3
VMAIN maximum switching frequency4
VMAIN peak coil static current limit
VAUX output voltage range
Symbol
Min
Typ
Max
Unit
VBAT
1.0
V
Vmain
3.13
3.3
3.47
V
Vmain_range
2.7
5.0
V
I3.3_1.8
200
mA
Freqmax_VM
100
kHz
ILIM_VM
0.85
1.0
1.15
A
VAUX_range
5.0
25
V
VAUXREF lower level voltage
VAUXREF upper level voltage
VAUXREF step size
VAUX maximum switching frequency
VAUX peak coil static current limit
Quiescent Supply Current at Standby Mode5
Reference Voltage @ no load
Battery Low Detect lower hysteresis threshold6
Battery Low Detect upper hysteresis threshold
PDELAY Pin output charging current
PDELAY Pin voltage threshold
VAUXREF_L
VAUXREF_H
VAUXREF_S
Freqmax_VL
ILIM_VL
Iqstandby
Vrefno_load
VLOBAT_L
VLOBAT_H
IchgPDELAY
VthPDELAY
1.0
1.1
1.2
V
2.0
2.2
2.4
V
17
mV
120
kHz
1.0
A
35
60
µA
1.19
1.22
1.25
V
0.8
0.85
0.9
V
1.05
1.1
1.15
V
0.8
1.0
1.2
µA
1.19
1.22
1.25
V
NOTE: 1. Output current capability is reduced with supply voltage due to decreased energy transfer. The supply voltage must not be higher than
VMAIN+0.6V to ensure boost operation. Max Start–up loading is typically 1V at 400 µA, 1.8V at 4.4 mA, and 2.2V at 88 mA.
NOTE: 2. Output voltage can be adjusted by external resistor to the VMAINFB pin.
NOTE: 3. At VBAT = 1.8V, output current capability increases with VBAT.
NOTE: 4. Only when current limit is not reached.
NOTE: 5. This is average current consumed by the IC from VDD, which is low–pass filtered from VMAIN, when only VMAIN is enabled and at no loading.
NOTE: 6. This is the minimum of ”LOWBATB” threshold for battery voltage, the threshold can be increased by external resistor divider from ”VBAT” to
”LOWBATSEN”.
http://onsemi.com
6