MAX15041 Datasheet, PDF (3/16 Pages) Maxim Integrated Products – Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches

Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
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)
PARAMETER
SS Current
SYMBOL
I_SS
CONDITIONS
V_SS = 0.45V, sourcing
MIN TYP MAX UNITS
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
Current Sense to COMP
Transconductance
COMP Clamp Low
PWM Compensation Ramp Valley
PWM CLOCK
Switching Frequency
Maximum Duty Cycle
Minimum Controllable On-Time
INTERNAL LDO OUTPUT (V_DD)
V_DD Output Voltage
V_DD Short-Circuit Current
LDO Dropout Voltage
V_DD Undervoltage Lockout
Threshold
V_DD Undervoltage Lockout
Hysteresis
POWER SWITCH
LX On-Resistance
High-Side Switch Source
Current-Limit Threshold
Low-Side Switch Sink
Current-Limit Threshold
LX Leakage Current
BST Leakage Current
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
HICCUP PROTECTION
G_MOD
f_SW
D
V_DD
V_{UVLO_TH}
V_{UVLO_HYST}
V_FB = 0.7V
I_VDD = 1mA to 25mA, V_IN = 6.5V
V_IN = 6.5V
I_VDD = 25mA, V_DD drops by -2%
V_DD rising
High-side switch, I_LX = 1A
Low-side switch, I_LX = 1A
V_BST = 33V, V_IN = V_LX = 28V
V_BST = 5V, V_IN = 28V, V_LX = 0V
V_BST = 33V, V_IN = V_LX = 28V
Rising
Blanking Time
0.65
V
9
S
0.68
V
830
mV
315 350
385
kHz
90
%
150
ns
4.75 5.1
5.5
V
30
80
mA
50
600
mV
4
4.25
V
150
mV
170
305
mΩ
105
175
5
6
7.2
A
-3
A
10
nA
10
10
nA
+155
°C
20
°C
16 x Soft-
Start Time
Note 3: Specifications are 100% production tested at T_A = +25°C. Limits over the operating temperature range are guaranteed by
design and characterization.
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