Rainbow Electronics MAX15041 - Manual (Page 3)

MAX15041
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
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Note 3: Specifications are 100% production tested at T A = +25°C. Limits over the operating temperature range are guaranteed by
design and characterization.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SS Current I SS V SS = 0.45V, sourcing 4.5 5 5.5 µA
SS Discharge Resistance R SS I SS = 10mA, sinking, V EN = 1.6V 6 Ω
SS Prebiased Mode Stop Voltage 0.65 V
Current Sense to COMP
Transconductance
G MOD 9 S
COMP Clamp Low V FB = 0.7V 0.68 V
PWM Compensation Ramp Valley 830 mV
PWM CLOCK
Switching Frequency f
SW
315 350 385 kHz
Maximum Duty Cycle D 90 %
Minimum Controllable On-Time 150 ns
INTERNAL LDO OUTPUT (V DD )
V DD Output Voltage V DD I VDD = 1mA to 25mA, V IN = 6.5V 4.75 5.1 5.5 V
V DD Short-Circuit Current V IN = 6.5V 30 80 mA
LDO Dropout Voltage I VDD = 25mA, V DD drops by -2% 50 600 mV
V DD Undervoltage Lockout
Threshold
V UVLO_TH V DD rising 4 4.25 V
V DD Undervoltage Lockout
Hysteresis
V UVLO_HYST 150 mV
POWER SWITCH
High-side switch, I LX = 1A 170 305
LX On-Resistance
Low-side switch, I LX = 1A 105 175
m Ω
High-Side Switch Source
Current-Limit Threshold
5 6 7.2 A
Low-Side Switch Sink
Current-Limit Threshold
-3 A
V
BST
= 33V, V
IN
= V
LX
= 28V 10
LX Leakage Current
V BST = 5V, V IN = 28V, V LX = 0V 10
nA
BST Leakage Current V BST = 33V, V IN = V LX = 28V 10 nA
THERMAL SHUTDOWN
Thermal-Shutdown Threshold Rising +155 °C
Thermal-Shutdown Hysteresis 20 °C
HICCUP PROTECTION
Blanking Time
16 x Soft-
Start Time
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 12V, C VDD = 1µF, C IN = 22µF, T A = T J = -40°C to +85°C, typical values are at T A = +25°C, unless otherwise noted.) (Note 3)