Datasheet

MAX1533A/MAX1537A
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= 12V, both SMPS enabled, V
CC
= 5V, FSEL = REF, SKIP = GND, V
ILIM_
= V
LDO5
, V
INA
= 15V, V
LDOA
= 12V,
I
LDO5
= I
LDO3
= I
LDOA
= no load, 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, SHDN, INA, LDOA to GND ...............................-0.3V to +30V
GND to PGND .......................................................-0.3V to +0.3V
LDO5, LDO3, V
CC
to GND .......................................-0.3V to +6V
ILIM3, ILIM5, PGDLY to GND...................................-0.3V to +6V
CSL3, CSH3, CSL5, CSH5 to GND ..........................-0.3V to +6V
ON3, ON5, FB3, FB5 to GND ..................................-0.3V to +6V
SKIP, OVP, UVP to GND...........................................-0.3V to +6V
PGOOD, FSEL, ADJA, ONA to GND ........................-0.3V to +6V
REF to GND................................................-0.3V to (V
CC
+ 0.3V)
DL3, DL5 to PGND..................................-0.3V to (V
LDO5
+ 0.3V)
BST3, BST5 to PGND .............................................-0.3V to +36V
LX3 to BST3..............................................................-6V to +0.3V
DH3 to LX3 ..............................................-0.3V to (V
BST3
+ 0.3V)
LX5 to BST5..............................................................-6V to +0.3V
DH5 to LX5 ..............................................-0.3V to (V
BST5
+ 0.3V)
LDO3, LDO5 Short Circuit to GND .............................Momentary
REF Short Circuit to GND ...........................................Momentary
INA Shunt Current.............................................................+15mA
Continuous Power Dissipation (T
A
= +70°C)
32-Pin TQFN (derate 21.3mW/°C above +70°C) .......1702mW
36-Pin TQFN (derate 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
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
INPUT SUPPLIES (Note 1)
LDO5 in regulation 6 26
V
IN
Input Voltage Range V
IN
IN = LDO5, V
OUT5
< 4.43V 4.5 5.5
V
V
IN
Operating Supply Current I
IN
LDO5 switched over to CSL5 15 35 µA
V
IN
Standby Supply Current
I
IN
(
STBY
)
V
IN
= 6V to 26V, both SMPS off,
includes I
SHDN
100
170 µA
V
IN
Shutdown Supply Current
I
IN
(
SHDN
)
V
IN
= 6V to 26V, SHDN = GND 5 17 µA
Quiescent Power Consumption P
Q
Both SMPS on, FB3 = FB5 = SKIP = GND,
V
CSL3
= 3.5V, V
CSL5
= 5.3V, V
INA
= 15V,
I
LDOA
= 0, P
IN
+ P
CSL3
+ P
CSL5
+ P
INA
3.5 4.5 mW
V
CC
Quiescent Supply Current I
CC
Both SMPS on, FB3 = FB5 = GND,
V
CSL3
= 3.5V, V
CSL5
= 5.3V
1.1 2.1 mA
MAIN SMPS CONTROLLERS
3.3V Output Voltage in Fixed
Mode
V
OUT3
V
IN
= 6V to 26V, SKIP = V
CC
(Note 2)
3.280 3.33 3.380
V
5V Output Voltage in Fixed Mode
V
OUT5
V
IN
= 6V to 26V, SKIP = V
CC
(Note 2)
4.975 5.05 5.125
V
Feedback Voltage in Adjustable
Mode
V
FB_
V
IN
= 6V to 26V, FB3 or FB5,
duty factor = 20% to 80% (Note 2)
0.990 1.005 1.020
V
Output-Voltage Adjust Range Either SMPS 1.0 5.5 V
FB3, FB5 Dual-Mode Threshold 0.1 0.2 V
Feedback Input Leakage Current
V
FB3
= V
FB5
= 1.1V
-0.1 +0.1
µA
DC Load Regulation
Either SMPS, SKIP = V
CC
,
I
LOAD
= 0 to full load
-0.1
%