MAX8505 MAXIM [Maxim Integrated Products], MAX8505 Datasheet - Page 3

• Manufacturer Part Number: MAX8505
• Description: 3A, 1MHz, 1% Accurate, Internal Switch Step-Down Regulator with Power-OK
• Manufacturer: MAXIM [Maxim Integrated Products]

ELECTRICAL CHARACTERISTICS (continued)
(V
COMP Clamp Voltage, Low
COMP Clamp Voltage, High
COMP Shutdown Resistance
LX (All LX Outputs Connected Together)
LX On-Resistance, High
LX On-Resistance, Low
LX C ur r ent- S ense Tr ansr esi stance
LX Current-Limit Threshold
LX Leakage Current
LX Switching Frequency
LX Minimum Off-Time
LX Maximum Duty Cycle
LX Minimum Duty Cycle
SLOPE COMPENSATION
Slope Compensation
BST
BST Shutdown Supply Current
CTL
CTL Input Threshold
CTL Input Current
POK (Power-OK)
POK Output Voltage, Low
POK Leakage Current
POK Fault Delay Time
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
IN
= V
CC
PARAMETER
= V
CTL
= +3.3V, V
_______________________________________________________________________________________
3A, 1MHz, 1% Accurate, Internal Switch
FB
Step-Down Regulator with Power-OK
= 0.8V, V
SYMBOL
R
COMP
T
= 1.25V, C
V
V
From COMP to GND, V
V
V
V
V
From LX to COMP
Sourcing, Typical Application Circuit
Sinking, V
V
V
V
5.5V
V
V
5.5V
V
5.5V
Extrapolated to 100% duty cycle
(V
V
V
3.3V, 5.5V
V
V
V
From FB to POK, any threshold
When LX stops switching T
IN
IN
IN
IN
IN
IN
IN
CTL
IN
IN
IN
IN
CC
IN
CTL
FB
POK
BST
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= 0.6V or 1.0V, I
= 5.5V, V
= 0
= 0V or 5.5V, V
= 5.5V
- V
CC
CC
BST
BST
BST
BST
CC
CC
CC
CC
CC
CC
LX
REF
IN
= 2.6V, 3.3V, 5.5V
= 2.6V, 3.3V,
= 2.6V, 3.3V, 5.5V, V
= 2.6V, 3.3V, 5.5V, V
= 5.5V,
= 2.6V, 3.3V,
= 2.6V, 3.3V,
= 2.6V,
) = V
- V
- V
- V
- V
= V
= 0.01µF, T
CTL
LX
LX
LX
LX
CONDITIONS
CC
IN
= 3.3V
= 2.6V
= 3.3V
= 2.6V
= 0
=
= 2.6V to 5.5V
IN
POK
CTL
= V
= 2mA
A
CC
= 0°C to +85°C, unless otherwise noted.)
= 0V
LX = 5.5V
LX = 0V
CTL = V
CTL = 2/3V
500kHz
1MHz
500kHz
1MHz
V
V
LX open
For 1MHz
For 500kHz
For shutdown
J
LX
LX
= 5.5V
rising
FB
FB
= 5.5V
= 0V
= 0.9V
= 0.7V
CC
CC
0.068
0.45
-100
0.85
0.44
MIN
-4.3
245
1.7
4.6
95
90
84
80
55
25
-1
0.086
0.001
+170
TYP
0.75
-2.6
110
300
5.6
0.5
1.9
38
42
38
42
94
89
10
25
50
20
13
1
5
0.104
MAX
1.00
1.15
0.56
-1.0
100
100
135
400
100
100
2.1
6.6
+1
74
74
15
10
10
10
70
45
8
1
UNITS
MHz
% of
V
mΩ
mΩ
mV
mV
µA
µA
µA
µA
ns
µs
°C
°C
%
%
Ω
Ω
V
V
A
CC
3