Electrical characteristics (continued) – Rainbow Electronics MAX15020 User Manual
Page 3
MAX15020
2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
_______________________________________________________________________________________
3
Note 1: Limits are 100% production tested at T
A
= T
J
= +25°C. Limits at -40°C and +125°C are guaranteed by design.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SOFT-START/REFIN/REFOUT/FB
Soft-Start Current
I
SS
8
15
26
µA
REFOUT Output Voltage
0.97
0.98
1.01
V
REFIN Input Range
0
3.6
V
REFIN = REFOUT
0.97
0.98
1.01
V
FB Accuracy
FB = COMP, V
REFIN
= 0.2V to 3.6V
V
REFIN
- 5mV
V
REFIN
V
REFIN
+ 5mV
mV
FB Input Current
V
SS
= 0.2V, V
FB
= 0V
-250
+250
nA
Open-Loop Gain
80
dB
Unity-Gain Bandwidth
1.8
MHz
f
SYNC
= 100kHz, V
IN
= 7.5V
9.4
PWM Modulator Gain (V
IN
/
V
RAMP
)
f
SYNC
= 500kHz, V
IN
= 40V
8.9
V/V
CURRENT-LIMIT COMPARATOR
Cycle-by-Cycle Switch Current
Limit
I
ILIM
2.5
3.5
4.5
A
Number of ILIM Events to Hiccup
4
—
Hiccup Timeout
512
Clock
periods
POWER SWITCH
Switch On-Resistance
V
BST
- V
LX
= 6V
0.18
0.35
Ω
BST Leakage Current
V
BST
= V
LX
= V
IN
= 40V
10
µA
Switch Leakage Current
V
IN
= 40V, V
LX
= V
BST
= 0V
10
µA
Switch Gate Charge
V
BST
- V
LX
= 6V
10
nC
THERMAL SHUTDOWN
Thermal Shutdown Temperature
T
SHDN
+160
°C
Thermal Shutdown Hysteresis
20
°C
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 36V, V
REG
= V
DVREG
, V
PGND
= V
GND
= V
EP
= 0V, V
SYNC
= 0V, C
REFOUT
= 0.1µF, T
A
= T
J
= -40°C to +125°C, FSEL = REG,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)