MAX8643 Maxim Integrated Products, MAX8643 Datasheet - Page 3

• Manufacturer Part Number: MAX8643
• Description: 2MHz Step-Down Regulator
• Manufacturer: Maxim Integrated Products

w
w
ELECTRICAL CHARACTERISTICS (continued)
(V
Open-Loop Voltage Gain
Error-Amplifier Unity-Gain
Bandwidth
Error-Amplifier Common-Mode
Input Range
Error-Amplifier Minimum Output
Current
FB Input Bias Current
CTL_
CTL_ Input Bias Current
High-Impedance Threshold
Hysteresis
REFIN
REFIN Input Bias Current
REFIN Common-Mode Range
REFIN Offset Voltage
LX (ALL PINS COMBINED)
LX On-Resistance, High Side
LX On-Resistance, Low Side
LX Current-Limit Threshold
LX Leakage Current
LX Switching Frequency
Frequency Range
LX Minimum Off-Time
LX Maximum Duty Cycle
LX Minimum On-Time
RMS LX Output Current
IN
w
= V
.
DD
= 3.3V, V
PARAMETER
D
a
FB
t
_______________________________________________________________________________________
= 0.5V, T
a
S
A
= -40°C to +85°C. Typical values are at T
h
1kΩ from COMP to GND
Parallel 10kΩ, 40pF from COMP to GND (Note 3)
V
V
V
V
V
V
Rising
Falling
All VID transitions
V
V
V
CTL1 = CTL2 = GND, T
I
I
V
V
V
V
R
LX
LX
e
DD
DD
COMP
FB
CTL_
CTL_
REFIN
DD
DD
IN
IN
IN
IN
FREQ
= -2A
= 2A
= 2.5V, high-side sourcing
= 3.6V, V
= 2.5V to 3.3V
= 2.5V to 3.3V
= 0.7V, CTL1 = CTL2 =
= 2.35V to 2.6V
= 2.6V to 3.6V
= 2.3V to 2.6V
= 2.6V to 3.6V
e
= 0V
= V
= 50kΩ, V
= 0.6V
= 1V
3A, 2MHz Step-Down Regulator
DD
t
EN
4
= V
IN
U
SS
= 2.5V to 3.3V
CONDITIONS
= 0V
A
.
= +25°C
with Integrated Switches
c
o
Sourcing
Sinking
T
T
V
V
V
V
T
T
R
R
A
A
A
A
IN
IN
IN
IN
FREQ
FREQ
A
m
= +25°C
= +25°C
= +25°C
= +85°C
= V
= V
= 2.5V
= 3.3V
= +25°C, circuit of Figure 1, unless otherwise noted.) (Note 2)
= 50kΩ
= 23.2kΩ
BST
BST
- V
- V
V
V
V
V
LX
LX
LX
LX
LX
LX
= 2.5V
= 3.3V
= 0V
= 3.6V
= 0V
= 3.6V
- 1.2V
1000
-500
-200
-500
MIN
V
500
0.9
1.8
14
93
-3
-2
0
0
DD
0
0
4
3
TYP
-100
115
-40
5.5
2.0
26
+7
50
39
37
36
34
40
96
80
-7
1
1
1
V
V
V
V
DD
DD
DD
DD
MAX
2000
0.75
- 1.65
- 1.65
1.1
2.2
+2
- 1.7
- 1.7
+3
58
55
75
UNITS
MHz
MHz
kHz
mΩ
mΩ
mV
mV
dB
nA
µA
nA
µA
µA
ns
ns
%
V
V
V
A
A
3