Rainbow-electronics MAX15023 Manual de usuario Pagina 2
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MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, R
T
= 33kΩ, C
VCC
= 4.7µF, C
IN
= 1µF, T
A
= -40°C to +85°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: These power limits are due to the thermal characteristics of the package, absolute maximum junction temperature (150°C),
and the JEDEC 51-7 defined setup. Maximum power dissipation could be lower, limited by the thermal shutdown protection
included in this IC.
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, refer to http://www.maxim-ic.com/thermal-tutorial
.
IN to SGND.............................................................-0.3V to +30V
BST_ to V
CC
............................................................-0.3V to +30V
LX_ to SGND .............................................................-1V to +30V
EN_ to SGND............................................................-0.3V to +6V
PGOOD_ to SGND .................................................-0.3V to +30V
BST_ to LX_ ..............................................................-0.3V to +6V
DH_ to LX_ ..........................................….-0.3V to (V
BST_
+ 0.3V)
DL_ to PGND_ ............................................-0.3V to (V
CC
+ 0.3V)
SGND to PGND_ .................................................. -0.3V to +0.3V
V
CC
to SGND................-0.3V to the lower of +6V or (V
IN
+ 0.3V)
All Other Pins to SGND...............................-0.3V to (V
CC
+ 0.3V)
V
CC
Short Circuit to SGND.........................................Continuous
V
CC
Input Current (IN = V
CC
, internal LDO not used) ......600mA
PGOOD_ Sink Current ........................................................20mA
Continuous Power Dissipation (T
A
= +70°C)(Note 1)
24-Pin TQFN-EP (derate 27.8mW/°C above +70°C) ..2222.2mW
Junction-to-Case Thermal Resistance (θ
JC
)
24-Pin TQFN-EP ..............................................................3°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
)(Note 2)
24-Pin TQFN-EP ............................................................36°C/W
Operating Temperature Range ...........................-40°C to +85°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
GENERAL
5.5 28
Input Voltage Range V
IN
V
IN
= V
CC
4.5 5.5
V
Quiescent Supply Current I
IN
V
FB1
= V
FB2
= 0.9V, no switching 4.5 6 mA
Standby Supply Current I
IN_SBY
V
EN1
= V
EN2
= SGND 0.21 0.35 mA
V
CC
REGULATOR
6V < V
IN
< 28V, I
LOAD
= 5mA
Output Voltage V
CC
V
IN
= 6V, 1mA < I
LOAD
< 100mA
5.00 5.2 5.50 V
V
CC
Regulator Dropout I
LOAD
= 100mA 0.07 V
V
CC
Short-Circuit Output Current V
IN
= 5V 150 250 mA
V
CC
Undervoltage Lockout V
CC_UVLO
V
CC
falling 3.6 3.8 4 V
V
CC
Undervoltage Lockout
Hysteresis
430 mV
ERROR AMPLIFIER (FB_, COMP_)
FB_ Input Voltage Set-Point V
FB_
594 600 606 mV
FB_ Input Bias Current I
FB_
V
FB_
= 0.6V -250 +250 nA
FB_ to COMP_
Transconductance
g
m
I
COMP
= ±40µA 650 1200 1900 µS
Amplifier Open-Loop Gain No load 80 dB
Amplifier Unity-Gain Bandwidth 10 MHz
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