MAX1540A Datasheet, PDF (2/49 Pages) Maxim Integrated Products – Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator

Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ABSOLUTE MAXIMUM RATINGS
V+, LDOON to GND ...............................................-0.3V to +28V
LDOOUT to GND (MAX1540A, 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 ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: For the MAX1540A, 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+).
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.
ELECTRICAL CHARACTERISTICS
(V+ = 15V, V_CC = V_DD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, 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)
Input Voltage Range
V_IN
MAX1540A: battery voltage, V+ > V_LDOOUT 5.5
MAX1541: battery voltage, V+ > V_LDOOUT
2
V_BIAS V_CC, V_DD (MAX1541)
4.5
28
28
5.5
V
V_LDOIN
MAX1541: LDO input supply,
V_LDOIN > V_LDOOUT
4.5
28
Quiescent Supply Current (V_CC)
FB1 and FB2 forced above the regulation
point, LSAT = GND
I_CC
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = V_CC, V_LSAT > 0.5V
0.7
1.5
mA
1.8
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
Quiescent Supply Current (V+)
MAX1540A: FB1 and FB2 forced above the
regulation point, ON1 or ON2 = V_CC,
I_V+
V_LDOON = V+ = 28V
MAX1541: ON1 or ON2 = V_CC,
V_LDOON = V+ = 28V
150
µA
25
40
Quiescent Supply Current
(LDOIN, MAX1541 Only)
Standby Supply Current (V_CC)
I_LDOIN
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = V_CC,
V_LDOON = V+ = 28V
ON1 = ON2 = GND, V_LDOON = V+ = 28V
110
µA
<1
5
µA
2 _______________________________________________________________________________________