Rainbow Electronics MAX1541 - Manual (Page 2)

MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Note 1: For the MAX1540, the gate-driver input supply (V DD ) is internally connected to the fixed 5V linear-regulator output (LDOOUT),
and the linear-regulator input supply (LDOIN) is internally connected to the battery voltage input (V+).
V+, LDOON to GND ...............................................-0.3V to +28V
LDOOUT to GND (MAX1540, Note 1) ......................-0.3V to +6V
LDOOUT to GND (MAX1541, Note 1) ....................-0.3V to +28V
V
DD to GND (MAX1541, Note 1) ..............................-0.3V to +6V
V CC , ON_ to GND.....................................................-0.3V to +6V
SKIP, PGOOD_ to GND............................................-0.3V to +6V
FB_, CSP_, ILIM_ to GND.........................................-0.3V to +6V
TON, OVP/UVP, LSAT to GND ...................-0.3V to (V
CC + 0.3V)
REF, OUT_ to GND.....................................-0.3V to (V
CC
+ 0.3V)
LDOIN to GND (MAX1541).....................................-0.3V to +28V
REFIN1, GATE, OD, FBLDO to GND (MAX1541).....-0.3V to +6V
FBLANK, CC1 to GND (MAX1541).............-0.3V to (V
CC + 0.3V)
DL_ to GND (Note 1) ..................................-0.3V to (V DD + 0.3V)
CSN_ to GND ............................................................-2V to +30V
DH_ to LX_..................................................-0.3V to (BST + 0.3V)
LX_ to GND................................................................-2V to +30V
BST_ to LX_ ..............................................................-0.3V to +6V
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (T
A = +70 °C)
32-Pin 5mm x 5mm Thin QFN (derated 21.3mW/ °C
above +70 °C).............................................................1702mW
40-Pin 6mm x 6mm Thin QFN (derated 26.3mW/ °C
above +70 °C).............................................................2105mW
Operating Temperature Range
MAX154_ET_ ...................................................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V+ = 15V, V CC = V DD = ON1 = ON2 = 5V, SKIP = GND, T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25 °C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
INPUT SUPPLIES (Note 1)
MAX1540: battery voltage, V+ > V LDOOUT 5.5 28
V IN
MAX1541: battery voltage, V+ > V LDOOUT 2 28
V BIAS V CC, V DD (MAX1541) 4.5 5.5 Input Voltage Range
V LDOIN
MAX1541: LDO input supply,
V
LDOIN > V LDOOUT
4.5 28
V
FB1 and FB2 forced above the regulation
point, LSAT = GND
0.7 1.5
Quiescent Supply Current (V CC ) I CC
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = V
CC , V LSAT > 0.5V
1.8
mA
Quiescent Supply Current
(V
DD , MAX1541 Only)
I
DD
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = V
CC
<1 5 µA
MAX1540: FB1 and FB2 forced above the
regulation point, ON1 or ON2 = V
CC ,
V LDOON = V+ = 28V
150
Quiescent Supply Current (V+) I V+
MAX1541: ON1 or ON2 = V CC ,
V LDOON = V+ = 28V
25 40
µA
Quiescent Supply Current
(LDOIN, MAX1541 Only)
I LDOIN
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = V
CC ,
V LDOON = V+ = 28V
110 µA
Standby Supply Current (V CC ) ON1 = ON2 = GND, V LDOON = V+ = 28V <1 5 µA