Operating Temperature Range ......................... -40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) ................................. +300°C
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
CC
= 5V, V
DD
= V
CC
, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Input-Voltage Range
Quiescent Supply Current
LED CURRENT REGULATOR
V
IN
= V
CC
= 4.75V to 5.5V, f
SW
= 500kHz
(MAX16821A)
V
IN
= 7V to 28V, f
SW
= 500kHz
(MAX16821A)
Differential Set Value
(V
SENSE
+ to V
SENSE
-)
(Note 2)
V
IN
= V
CC
= 4.75V to 5.5V,
f
SW
= 500kHz (MAX16821B)
V
IN
= 7V to 28V, f
SW
= 500kHz
(MAX16821B)
V
IN
= V
CC
= 4.75V to 5.5V,
f
SW
= 500kHz (MAX16821C)
V
IN
= 7V to 28V, f
SW
= 500kHz
(MAX16821C)
Soft-Start Time
STARTUP/INTERNAL REGULATOR
V
CC
Undervoltage Lockout
(UVLO)
UVLO Hysteresis
V
CC
Output Voltage
MOSFET DRIVER
Output Driver Impedance
Output Driver Source/Sink
Current
Nonoverlap Time
I
DH
, I
DL
t
NO
C
DH/DL
= 5nF
Low or high output, I
SOURCE/SINK
= 20mA
1.1
4
35
3
Ω
A
ns
UVLO
V
CC
rising
V
CC
falling
V
IN
= 7V to 28V, I
SOURCE
= 0 to 60mA
4.85
4.1
4.3
200
5.10
5.30
4.5
V
mV
V
t
SS
0.594
0.594
0.098
0.098
0.028
0.028
0.600
0.600
0.100
0.100
0.030
0.030
1024
0.606
0.606
0.102
V
0.102
0.032
0.032
Clock
Cycles
SYMBOL
V
IN
I
Q
CONDITIONS
Internal LDO on
Internal LDO off (V
CC
connected to V
IN
)
V
EN
= V
CC
or SGND, no switching
MIN
7
4.75
2.7
TYP
MAX
28
5.50
5.5
V
mA
UNITS
www.maximintegrated.com
Maxim Integrated
│
2
MAX16821A/MAX16821B/
MAX16821C
Electrical Characteristics (continued)
High-Power Synchronous HBLED
Drivers with Rapid Current Pulsing
(V
CC
= 5V, V
DD
= V
CC
, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
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