AN30183A Datasheet, PDF (9/48 Pages) Panasonic Semiconductor – 600mA Synchronous DC-DC Step Down Regulator (1ch) 300mA LDO Regulator (4ch) Multi Power Supply (High Efficiency Power LSI)

AN30183A
APPLICATION INFORMATION (Continued)
REFERENCE VALUES FOR DESIGN
V_VBAT(DDVBAT1 = VB = VIN2) = 3.1V to 4.5V, DVDD = 1.85V , DC-DC : Co = 4.7 µF, Lo = 1 µH / LDO : Co =1.0 µF
T_a = 25 °C ± 2 °C unless otherwise noted.
Parameter
Symbol
DCDC1 (DC-DC Step Down Regulator)
Conditions
Reference values
Unit ^Notes
Min Typ Max
Output Voltage
VDCDC1
IDCDC1 = – 300 mA
Vout = 1.2 V setting
1.170 1.200 1.230 V *2
Consumption current on active IREGDCCD1 IDCDC1 = 0 mA
10
25
40 μA *2
Output over current limit
From FB1 × 100% to FB1 ×
ILIMDCDC1 70%
—
1.0
1.2 A *2
VB = 3.7 V
Efficiency 1
DDVBAT1 = 3.4 V
EFFDCDC11 VDCDC1 = 2.4 V
IDCDC1 = – 150 mA
85
90
— % *2
Efficiency 2
DDVBAT1 = 3.7 V
EFFDCDC12 VDCDC1 = 1.2 V
IDCDC1 = – 150 mA
75
80
— % *2
LX leak current
ILXL1
DDVBAT1 = 5.5 V
DCDC1 = Disable
VLX1 = 0 V or 5.5 V
–1
0
1 μA *2
Discharge resistance
RDISDCDC1
—
0.5 1.0 2.0 kΩ *2
Notes) *2 :Checked by design, not production tested.
9
Ver. AEB