Rainbow-electronics MAX17031 Manual do Utilizador Página 2
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MAX17031
Dual Quick-PWM Step-Down Controller with Low-
Power LDO and RTC Regulator for MAIN Supplies
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 2, no load on LDO5, RTC, OUT1, OUT2, and REF, V
IN
= 12V, V
DD
= V
CC
= V
SKIP
= 5V, ONLDO = RTC, ON1 = ON2
= V
CC
, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN to GND ...............................................................-0.3V to +28V
V
DD
, V
CC
to GND .....................................................-0.3V to +6V
RTC, LDO5, ONLDO to GND ...................................-0.3V to +6V
OUT2 to GND ...........................................................-0.3V to +6V
ON1, ON2, PGOOD to GND.....................................-0.3V to +6V
OUT1 to GND..........................................-0.3V to (V
LDO5
+ 0.3V)
SKIP to GND...............................................-0.3V to (V
CC
+ 0.3V)
REF, ILIM1, ILIM2 to GND..........................-0.3V to (V
CC
+ 0.3V)
DL_ to GND ................................................-0.3V to (V
DD
+ 0.3V)
BST_ to GND ..........................................................-0.3V to +36V
BST_ to V
DD
............................................................-0.3V to +30V
DH1 to LX1 ..............................................-0.3V to (V
BST1
+ 0.3V)
BST1 to LX1..............................................................-0.3V to +6V
DH2 to LX2 ..............................................-0.3V to (V
BST2
+ 0.3V)
BST2 to LX2..............................................................-0.3V to +6V
LDO5, RTC, REF Short Circuit to GND.......................Momentary
RTC Current Continuous.....................................................+5mA
LDO5 Current (Internal Regulator) Continuous ..............+100mA
LDO5 Current (Switched Over) Continuous ...................+200mA
Continuous Power Dissipation (T
A
= +70°C)
24-Pin, 4mm x 4mm Thin QFN (T2444-3)
(derate 27.8mW/°C above +70°C).................................2.22W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
INPUT SUPPLIES
IN Input Voltage Range LDO5 in regulation 6 24 V
IN Standby Supply Current
V
IN
= 6V to 24V, ON1 = ON2 = GND,
ONLDO = RTC
85 175 µA
IN Shutdown Supply Current
V
IN
= 4.5V to 24V,
ON1 = ON2 = ONLDO = GND
40 70 µA
IN Supply Current I
IN
ON1 = ON2 = V
CC
, V
SKIP
= V
CC
;
V
OUT1
= 5.3V, V
OUT2
= 3.5V
0.1 0.2 mA
V
CC
Bias Supply Current I
VCC
ON1 = ON2 = V
CC
, V
SKIP
= V
CC
;
V
OUT1
= 5.3V, V
OUT2
= 3.5V
0.7 1.5 mA
PWM CONTROLLERS
OUT1 Output-Voltage Accuracy V
OUT1
V
SKIP
= 1.8V 4.95 5.00 5.05 V
OUT2 Output-Voltage Accuracy V
OUT2
V
SKIP
= 1.8V 3.267 3.30 3.333 V
Either SMPS, V
SKIP
= 1.8V, I
LOAD
= 0 to 5A -0.1
Either SMPS, V
SKIP
= GND, I
LOAD
= 0 to 5A -1.7
Load Regulation Error
Either SMPS, V
SKIP
= V
CC
, I
LOAD
= 0 to 5A -1.5
%
Line Regulation Error Either SMPS, IN = 6V to 28V 0.005 %/V
DH1 On-Time t
ON1
V
OUT1
= 5.0V (Note 1) 895 1052 1209 ns
DH2 On-Time t
ON2
V
OUT2
= 3.3V (Note 1) 833 925 1017 ns
Minimum Off-Time t
OFF(MIN)
(Note 1) 300 400 ns
Soft-Start Slew Rate t
SS
Rising/falling edge on ON1 or ON2 1 ms
Ultrasonic Operating Frequency f
SW(USONIC)
V
SKIP
= GND 20 34 kHz
Note: Measurements are valid using a 20MHz bandwidth limit.
- MAX17031 1
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