Datasheet

MAX5070/MAX5071
High-Performance, Single-Ended, Current-Mode
PWM Controllers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +15V, R
T
= 10kΩ, C
T
= 3.3nF, V
VREF
= OPEN, C
VREF
= 0.1µF, COMP = OPEN, V
FB
= 2V, CS = GND, T
A
= -40°C to +125°C,
unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
CURRENT-SENSE AMPLIFIER
Gain A
CS
(Notes 3, 4)
2.85
3
3.26
V/V
MAX5070A/B (Note 3)
0.95
1
1.05
Maximum Current-Sense Signal V
CS_MAX
V
COMP
= 5V, MAX5071_
0.95
1
1.05
V
Power-Supply Rejection Ratio PSRR 12V ≤ V
CC
≤ 25V 70 dB
Input Bias Current I
CS
-1
-2.5
µA
Delay From CS to OUT
t
CS_DELAY
50mV overdrive 60 ns
MOSFET DRIVER
OUT Low-Side On-Resistance
V
RDS_ONL
I
SINK
= 200mA 4.5 12 Ω
OUT High-Side On-Resistance
V
RDS_ONH
I
SOURCE
= 100mA 3.5 9 Ω
I
SOURCE
(Peak) I
SOURCE
C
OUT
= 10nF 2 A
I
SINK
(Peak) I
SINK
C
OUT
= 10nF 1 A
Rise Time t
r
C
OUT
= 1nF 15 ns
Fall Time t
f
C
OUT
= 1nF 22 ns
UNDERVOLTAGE LOCKOUT/STARTUP
Startup Voltage Threshold
V
CC_START
15.2
16
16.8
V
Minimum Operating Voltage After
Turn-On
V
CC_MIN
9.2 10
10.8
V
Undervoltage-Lockout Hysteresis
UVLO
HYST
6V
PWM
MAX5070A/MAX5071A
94.5
96
97.5
Maximum Duty Cycle D
MAX
MAX5070B/MAX5071B/MAX5071C 48
49.8
50
%
Minimum Duty Cycle D
MIN
0%
SUPPLY CURRENT
Startup Supply Current I
START
32 65 µA
Operating Supply Current I
CC
V
FB
= V
CS
= 0V 3 5 mA
Zener Bias Voltage at V
CC
V
Z
I
CC
= 25mA 24
26.5
V
THERMAL SHUTDOWN
Thermal Shutdown T
SHDN
+150
°C
Thermal-Shutdown Hysteresis T
HYST
4°C
SYNCHRONIZATION (MAX5071A/MAX5071B only, Note 5)
SYNC Frequency Range f
SYNC
20
1000
kHz
SYNC Clock Input High
Threshold
V
SYNCINH
3.5 V
SYNC Clock Input Low Threshold
V
SYNCINL
0.8 V
SYNC Clock Input Minimum
Pulse Width
t
PW_SYNCIN
200
ns
SYNC Clock Output High Level V
SYNCOH
1mA external pulldown 4.0 4.7 V
SYNC Clock Output Low Level V
SYNCOL
R
SYNC
= 5kΩ 0 0.1 V