MAX8893A Datasheet, PDF (14/50 Pages) Maxim Integrated Products – μPMICs for Multimedia Application Processors in a 3.0mm x 2.5mm WLP

µPMICs for Multimedia Application Processors
in a 3.0mm x 2.5mm WLP
Typical Operating Characteristics (continued)
(Typical Operating Circuit, VIN = 3.7V, CBATT = CIN1 = CIN2 = 2.2FF, CREFBP = 0.1FF, TA = +25NC, unless otherwise noted.)
STEP-DOWN SWITCHING FREQUENCY
vs. LOAD CURRENT
4000
3600
3200
2800
2400
2000
1600
1200
800
400
0
0
VBATT = 3.7V
VBUCK = 1.0V
100 200 300 400 500
LOAD CURRENT (mA)
STEP-DOWN LIGHT-LOAD
SWITCHING WAVEFORMS
MAX8893A toc15
VBUCK
50mV/div
(AC-COUPLED)
STEP-DOWN OUTPUT VOLTAGE
vs. LOAD CURRENT
1.02
1.01
VBATT = 3.7V
VBATT = 4.2V
1.00
0.99
0.98
0.97
0
VBATT = 3.0V
VBUCK = 1.0V
100 200 300 400 500
LOAD CURRENT (mA)
VBUCK
STEP-DOWN MEDIUM-LOAD
SWITCHING WAVEFORMS
MAX8893A toc16
20mV/div
(AC-COUPLED)
VLX
2V/div
VLX
2V/div
IL
1mA LOAD, VBUCK = 1.0V
10µs/div
100mA/div
V_BUCK
STEP-DOWN HEAVY-LOAD
SWITCHING WAVEFORMS
MAX8893A toc17
20mV/div
(AC-COUPLED)
IL
40mA LOAD, VBUCK = 1.0V
400ns/div
100mA/div
V_ENBUCK
STEP-DOWN STARTUP AND
SHUTDOWN WAVEFORM
MAX8893A toc18
2V/div
V_LX
IL
300mA LOAD, VBUCK = 1.0V
400ns/div
2V/div
200mA/div
VBUCK
IIN
500mV/div
500mA LOAD, V_BUCK = 1.0V
100mA/div
100µs/div
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