MAX8505 MAXIM [Maxim Integrated Products], MAX8505 Datasheet - Page 2

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

ABSOLUTE MAXIMUM RATINGS
CTL, FB, IN, V
COMP, REF, POK to GND ..........................-0.3V to (V
BST to LX..................................................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
Continuous Power Dissipation (T
3A, 1MHz, 1% Accurate, Internal Switch
Step-Down Regulator with Power-OK
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
2
IN AND V
IN Voltage Range
V
IN Supply Current
V
Total Shutdown Current into IN
and V
V
Threshold
REF
REF Voltage
REF Shutdown Resistance
REF Soft-Start Current
Soft-Start Ramp Time
FB
FB Regulation Voltage
FB Input Bias Current
Maximum Output Current
FB Threshold for POK Transition
FB to POK Delay
COMP
COMP Transconductance
Gain from FB to COMP
IN
16-Pin QSOP (derate 12.5mW/°C above +70°C).......1000mW
CC
CC
CC
_______________________________________________________________________________________
= V
Voltage Range
Supply Current
Undervoltage Lockout
CC
CC
CC
PARAMETER
= V
CC
CTL
to GND .........................................-0.3V to +6V
= +3.3V, V
FB
A
= 0.8V, V
= +70°C)
SYMBOL
I
OUT_MAX
UVLO
I
V
SHDN
V
V
I
I
CC
REF
CC
IN
COMP
IN
th
= 1.25V, C
Switching with no load
Switching with no load
V
V
When LX starts/stops
switching
I
From REF to GND, V
V
Output from 0% to 100%, C
1µF
V
V
V
L = 1µH/5.9mΩ (Note 1)
FB rising or falling
From FB to COMP
V
FB rising or falling
REF
IN
LX
REF
IN
FB
IN
COMP
CC
= V
= 2.6V to 5.5V
= V
= 0
= 0.7V
= 0µA, V
= 0.4V
+ 0.3V)
CC
CC
= 1.25V to 1.75V
REF
= V
= 3.3V, V
IN
= 0.01µF, T
BST
CONDITIONS
= V
- V
CC
Operating Temperature Range
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
OUT
CTL
LX
MAX8505EEE...................................................-40°C to +85°C
= 2.6V to 5.5V
= 5.5V, V
= 0V
= 1.2V,
A
= 0°C to +85°C, unless otherwise noted.)
V
V
V
V
V
V
REF
FB high
FB low
IN
IN
CC
CC
CC
CC
= 3.3V
= 5.5V
= 0.01µF to
= 3.3V
= 5.5V
rising
falling
CTL
= 0V,
0.792
0.792
-13.5
MIN
2.25
10.5
2.6
2.2
20
60
3
0.800
0.800
TYP
2.40
2.35
0.01
100
-12
10
20
13
25
32
12
50
80
6
3
6
0.808
0.808
-10.5
MAX
V
2.55
13.5
100
160
5.5
0.1
10
10
50
30
CC
UNITS
ms/µF
mA
mA
dB
µA
µA
µA
µS
µs
%
Ω
V
V
V
V
V
A