MAX8649 Maxim Integrated Products, MAX8649 Datasheet - Page 7

• Manufacturer Part Number: MAX8649
• Description: 1.8A Step-Down Regulator
• Manufacturer: Maxim Integrated Products

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( Typical Operating Circuit , V
20
18
16
14
12
10
8
6
4
2
0
2.5
SUPPLY VOLTAGE (FORCED PWM)
NO-LOAD SUPPLY CURRENT vs.
1.8A Step-Down Regulator with Differential
SUPPLY VOLTAGE (V)
3.5
0.910
0.905
0.900
0.895
0.890
0.885
0.880
V
_______________________________________________________________________________________
OUT
V
LX
I
L
0
OUTPUT VOLTAGE vs. LOAD CURRENT
NO SYNC
500mA LOAD
V
FORCED PWM
OUT
POWER SAVE
4.5
IN1
26MHz SYNC
0.3
= 1.3V
MEDIUM LOAD SWITCHING
= V
0.6
LOAD CURRENT (A)
IN2
WAVEFORMS
Remote Sense in 2mm x 2mm WLP
200ns/div
= 3.6V, V
5.5
0.9
1.2
V
AGND
OUT
Typical Operating Characteristics (continued)
1.32
1.31
1.30
1.29
1.28
1.27
1.26
= 0.9V
MAX8649 toc15
1.5
0
OUTPUT VOLTAGE vs. LOAD CURRENT
= V
POWER SAVE
V
OUT
1.8
PGND
TA = -40
0.4
TA = +35
20mV/div
2V/div
500mA/div
= 1.3V
LOAD CURRENT (A)
= 0V, V
°
°
C
0.8
C
OUT
TA = +85
1.2
= 1.1V, V
°
C
V
V
1.6
OUT
OUT
V
V
LX
LX
I
I
L
L
HEAVY LOAD SWITCHING WAVEFORMS
LIGHT LOAD SWITCHING WAVEFORMS
10mA LOAD, V
1.8A LOAD
V
DD
OUT
2.0
= 1.3V
= 1.8V, T
1.115
1.110
1.105
1.100
1.095
1.090
1.085
OUT
200ns/div
= 1.3V
A
0
2μs/div
OUTPUT VOLTAGE vs. LOAD CURRENT
= +25°C, unless otherwise noted.)
FORCED PWM
POWER SAVE
0.3
0.6
LOAD CURRENT (A)
MAX8649 toc14
MAX8649 toc16
0.9
20mV/div
2V/div
200mA/div
20mV/div
2V/div
1A/div
1.2
V
OUT
= 1.1V
1.5
1.8
7