MAX1515 Datasheet, PDF (8/24 Pages) Maxim Integrated Products – Low-Voltage, Internal Switch, Step-Down/DDR Regulator

Low-Voltage, Internal Switch,
Step-Down/DDR Regulator
Typical Operating Characteristics (continued)
(MAX1515 Circuit of Figure 1, V_IN = 2.5V, V_DD = V_CC = SHDN = MODE = 3.3V, T_A = +25°C, unless otherwise noted.)
1.104
1.102
1.100
1.098
1.096
0
REF VOLTAGE
vs. REF LOAD CURRENT
20
40
60
80
100
REF LOAD CURRENT (μA)
REFOUT VOLTAGE REGULATION
vs. LOAD CURRENT
1.265
1.260
1.255
1.250
1.245
1.240
1.235
-15 -10 -5 0 5 10 15
REFOUT LOAD CURRENT (mA)
TOFF TIME
vs. TOFF RESISTOR
5
4
3
2
1
0
0
100 200 300 400 500
TOFF RESISTOR (kΩ)
PEAK CURRENT LIMIT
vs. SS VOLTAGE
5
4
3
2
1
0
1.0
V_IN = 2.5V
V_OUT = 1.25V
R_TOFF = 110kΩ
1.2
1.4
1.6
1.8
SS VOLTAGE (V)
STARTUP AND SHUTDOWN WAVEFORM
(HEAVY LOAD)
MAX1515 toc12
3.3V
0
A
0
B
0
C
1A
0
D
1.25V
0
E
SKIP = GND, R_LOAD = 10Ω
A: PGOOD, 5V/div
B: SS, 2V/div
C: SHDN, 5V/div
500μs/div
D: INDUCTOR CURRENT, 1A/div
E: OUTPUT VOLTAGE, 1V/div
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