Datasheet

(V
CC
= +15V, V+ = +3V to +5.5V referenced to PGND, R
T
= 10kΩ, C
T
= 3.3nF, REF = open, COMP = open, C
REF
= 0.1µF, V
FB
= 2V,
CS = AGND, AGND = PGND = 0V; all voltages are measured with respect to AGND, unless otherwise noted. T
J
= T
A
= -40°C to +125°C,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT-SENSE AMPLIFIER
Current-Sense Gain A
CS
(Notes 3, 4) 2.85 3 3.40 V/V
Maximum Current-Sense Signal V
CS
_
MAX
(Note 3) 0.275 0.300 0.325 V
Power-Supply Rejection Ratio PSRR 12V ≤ V
CC
≤ 25V 70 dB
Current-Sense Input Bias Current I
CS
V
COMP
= 0V -1 -2.5 µA
Current Sense to OUT Delay t
PWM
50mV overdrive 60 ns
MOSFET DRIVER
OUT Low-Side On-Resistance V
RDS
_
ONL
I
SINK
= 200mA
T
J
= -40°C to +85°C (Note 2) 4.5 10
Ω
T
J
= -40°C to +125°C 4.5 12
OUT High-Side On-Resistance V
RDS
_
ONH
I
SOURCE
=
100mA
T
J
= -40°C to +85°C (Note 2) 3.5 7.5
Ω
T
J
= -40°C to +125°C 3.5 10
Source Current (Peak) I
SOURCE
C
LOAD
= 10nF 2 A
Sink Current (Peak) I
SINK
C
LOAD
= 10nF 1 A
Rise Time t
R
C
LOAD
= 1nF 15 ns
Fall Time t
F
C
LOAD
= 1nF 22 ns
UNDERVOLTAGE LOCKOUT/STARTUP
Startup Voltage Threshold V
CC
_
START
7.98 8.4 8.82 V
Minimum Operating Voltage After
Turn-On
V
CC
_
MIN
7.1 7.6 8.0 V
Undervoltage-Lockout Hysteresis UVLO
HYST
0.8 V
PULSE-WIDTH MODULATION (PWM)
Maximum Duty Cycle D
MAX
94.5 96 97.5 %
Minimum Duty Cycle D
MIN
0 %
SUPPLY CURRENT
Startup Supply Current I
START
V
CC
= 7.5V 32 65 µA
Operating Supply Current I
CC
V
FB
= V
CS
= 0V 3 5 mA
V
CC
Zener Voltage V
Z
I
CC
= 25mA 24 26.5 V
www.maximintegrated.com
Maxim Integrated │ 3
MAX16809 Integrated 16-Channel LED Driver with
Switch-Mode Boost and SEPIC Controller
Electrical Characteristics (PWM Controller) (continued)