Rainbow Electronics MAX15022 User Manual
Page 2
MAX15022
Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Dual LDO Controllers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
AVIN
= V
PVIN_
= V
DVDD_
= 3.3V, V
PGND_
= V
SGND
= 0V, R
T
= 25k
Ω, and T
A
= T
J
= -40°C to +125°C, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 3)
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: LX has internal diodes to PGND_ and PVIN_. Applications that forward bias these diodes should take care not to exceed
the IC’s package power dissipation limits.
Note 2: 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 see
www.maxim-ic.com/thermal-tutorial
.
AVIN, PVIN_, B_, DVDD_, EN_, FB_, RT,
SEL to SGND .........................................................-0.3V to +6V
COMP_ to SGND .....................................-0.3V to (V
AVIN
+ 0.3V)
PGND_ to SGND ...................................................-0.3V to +0.3V
LX Current (Note 1)
Regulator 1...............................................................................6A
Regulator 2...............................................................................3A
Current into Any Pin Other than PVIN_,
LX_ and PGND_.............................................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TQFN (derate 34.5mW/°C above +70°C) .....2758.6mW
Junction-to-Case Thermal Resistance (
θ
JC
)(Note 2) .........2°C/W
Junction-to-Ambient Thermal Resistance (
θ
JA
)(Note 2) ..29°C/W
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SYSTEM SPECIFICATIONS
Input-Voltage Range
V
AVIN
= V
PVIN1
= V
PVIN2
= V
DVDD1
=
V
DVDD2
2.5
5.5
V
Undervoltage Lockout Threshold
AVIN rising
2.1
2.2
2.3
V
Undervoltage Lockout Hysteresis
0.12
V
Operating Supply Current
V
EN_
= 1.3V, V
FB_
= 0.8V
3.5
6
mA
Shutdown Supply Current
V
EN_
= 0V
30
65
μA
PWM DIGITAL SOFT-START/SOFT-STOP
Soft-Start/Soft-Stop Duration
4096
Clock
Cycles
Reference Voltage Steps
64
Steps
PWM ERROR AMPLIFIERS
FB1, FB2 Input Bias Current
-1
+1
μA
FB1, FB2 Voltage Set-Point
0.593
0.599
0.605
V
COMP1, COMP2 Voltage Range
I
COMP
_ = -250μA to +250μA
0.3
V
AVIN
- 0.5
V
Error-Amplifier Open-Loop Gain
80
dB
Error-Amplifier Unity-Gain
Bandwidth
12
MHz