Manual

MAX8649
1.8A Step-Down Regulator with Differential
Remote Sense in 2mm x 2mm WLP
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN1
= V
IN2
= 3.6V, V
AGND
= V
PGND
= 0V, V
DD
= 1.8V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
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.
IN1, IN2 to AGND ..................................................-0.3V to +6.0V
V
DD
to AGND.........................................................-0.3V to +4.0V
LX, SNS+, VID0, VID1, EN to AGND..........-0.3V to (V
IN1
+ 0.3V)
SCL, SDA, SYNC to AGND.........................-0.3V to (V
DD
+ 0.3V)
PGND, SNS- to AGND...........................................-0.3V to +0.3V
RMS LX Current ..............................................................1800mA
Continuous Power Dissipation (T
A
= +70°C)
16-Bump WLP 0.5mm Pitch
(derate 13mW/°C above +70°C)............................1040mW
Operating Temperature Range ...........................-40°C to +85°C
Junction to Ambient Thermal Resistance (θ
JA
) (Note 1)..76°C/W
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering, reflow) ............................+260°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
IN1, IN2 Operating Range 2.5 5.5 V
V
DD
Operating Range 1.8 3.6 V
V
DD
Undervoltage Lockout
(UVLO) Threshold
V
DD
falling 0.54 0.865 1.35 V
V
DD
UVLO Hysteresis 50 mV
IN_ Undervoltage Lockout
(UVLO) Threshold
V
IN
falling 2.10 2.15 2.20 V
IN_ UVLO Hysteresis 70 mV
T
A
= +25°C 0.01 1
V
DD
Shutdown Supply Current
V
IN1
= V
IN2
= 5.5V,
EN = V
DD
= AGND
T
A
= +85°C 0.01
µA
T
A
= +25°C 0.25 1
IN1, IN2 Shutdown Supply
Current
V
IN1
= V
IN2
= 5.5V,
EN = V
DD
= AGND
T
A
= +85°C 0.25
µA
T
A
= +25°C 0.35 1
IN1, IN2 Standby Supply Current
V
IN1
= V
IN2
= 5.5V, SCL = SDA =
V
DD
, EN = AGND, I
2
C ready
T
A
= +85°C 0.35
µA
T
A
= +25°C 0.02 1
V
DD
Standby Supply Current
V
IN1
= V
IN2
= V
DD
= 3.6V,
SCL = SDA = V
DD
, EN = AGND,
I
2
C ready
T
A
= +85°C 0.02
µA
LOGIC INTERFACE
EN, VID0, VID1 1.4
Logic Input High Voltage (V
IH
)
V
IN1
= V
IN2
= 2.5V to 5.5V,
V
DD
= 1.8V to 3.6V
SYNC, SCL, SDA 0.7 x V
D D
V
EN, VID0, VID1 0.4
Logic Input Low Voltage (V
IL
)
V
IN1
= V
IN2
= 2.5V to 5.5V,
V
DD
= 1.8V to 3.6V
SYNC, SCL, SDA 0.3 x V
D D
V
T
A
= +25°C -1 0.01 +1
SDA, SCL, SYNC Logic Input
Current
V
IL
= 0V or V
IH
= 3.6V,
EN = AGND
T
A
= +85°C 0.01
µA
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.