Electrical characteristics (continued) – Rainbow Electronics MAX15001 User Manual
Page 3
MAX15000/MAX15001
Current-Mode PWM Controllers with
Programmable Switching Frequency
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +12V (for MAX15000, bring V
IN
up to 23.6V for startup), 10nF bypass capacitors at IN and V
CC
, R12 = 15k
Ω (MAX1500_A), R12
= 7.5k
Ω (MAX1500_B), R15 = 1kΩ, C6 = 100nF (see the Typical Application Circuit), NDRV = open, V
UVLO/EN
= +1.4V, V
FB
= +1.0V,
COMP = open, V
CS
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GATE DRIVER
R
ON(LOW)
Measured at NDRV sinking 100mA
2
4
Driver Output Impedance
R
ON(HIGH)
Measured at NDRV sourcing 20mA
4
10
Ω
Driver Peak Sink Current
1
A
Driver Peak Source Current
0.65
A
PWM COMPARATOR
Comparator Offset Voltage
V
PWM
V
COMP
- V
CS
1.24
1.38
1.54
V
CS Input Bias Current
I
CS
V
CS
= 0V
-4
+4
µA
Comparator Propagation Delay
t
PWM
Change in V
CS
= 0.1V
60
ns
CURRENT-LIMIT COMPARATOR
Current-Limit Trip Threshold
V
CS
900
1000
1100
mV
CS Input Bias Current
I
CS
V
CS
= 0V
-4
+4
µA
Propagation Delay From
Comparator Input to NDRV
t
PDCS
100mV overdrive
60
ns
IN CLAMP VOLTAGE
IN Clamp Voltage
V
INC
2mA sink current (Note 2)
24.1
26.1
29.0
V
ERROR AMPLIFIER
Voltage Gain
R
LOAD
= 100k
Ω
80
dB
Unity-Gain Bandwidth
R
LOAD
= 100k
Ω, C
LOAD
= 200pF
2
MHz
Phase Margin
R
LOAD
= 100k
Ω, C
LOAD
= 200pF
65
degrees
FB Input Offset Voltage
±1
mV
COMP High Voltage
I
COMP
= 0
2.8
COMP Low Voltage
I
COMP
= 0
1.1
V
Source Current
0.5
mA
Sink Current
0.5
mA
Reference Voltage
V
REF
(Note 3)
1.230
V
Reference Voltage Accuracy
-1.5
+1.5
%
FB Input Bias Current
-50
+50
nA
COMP Short-Circuit Current
8
mA
DIGITAL SOFT-START
1984
NDRV
cycles
Soft-Start Duration
t
SS
f
SW
= 350kHz
5.6
ms
Reference Voltage Steps During
Soft-Start
31
steps
Reference Voltage Step
39.67
mV