IC CTRLR PWM STP-DN TRIPL 32WQFN

MAX15048ETJ+

Manufacturer Part NumberMAX15048ETJ+
DescriptionIC CTRLR PWM STP-DN TRIPL 32WQFN
ManufacturerMaxim Integrated Products
MAX15048ETJ+ datasheet
 


Specifications of MAX15048ETJ+

ApplicationsPower Supply Controller, SequencerVoltage - Supply4.7 V ~ 23 V
Current - Supply6mAOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case32-WQFN Exposed Pad
Number Of Outputs3Output Voltage5 V
Input Voltage4.7 V to 23 VSupply Current6 mA
Switching Frequency200 KHzMounting StyleSMD/SMT
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Lead Free Status / RoHS StatusLead free / RoHS CompliantVoltage - Input-
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PIN
NAME
Controller Power-Good Output. Pull up PGOOD with a resistor to a positive voltage below 5.5V.
For the MAX15048, PGOOD output releases when all three V
12
PGOOD
MAX15049, PGOOD output releases when all three controllers are out of prebias and all three V
voltages are above 0.55V.
Controller 1 Transconductance Error-Amplifier Output. Connect COMP1 to the compensation
13
COMP1
feedback network of output 1.
Controller 1 Feedback Regulation Point. Connect to the center tap of a resistive voltage-divider from
14
FB1
the converter output to SGND to set the output voltage. The FB1 voltage regulates to 0.6V (typ).
Controller 1 Enable Input. For tracking (MAX15048), EN1 must be above 0.6V, V
controller to start outputs 1, 2, and 3. Controller 1 is the master. Use the master as the highest output
15
EN1
voltage in a coincident tracking configuration. For the MAX15049, EN1 must be above 0.6V for the
PWM controller to start output 1.
16
BST1
Controller 1 High-Side Gate-Driver Supply. Connect a 0.1FF ceramic capacitor from BST1 to LX1.
17
DH1
Controller 1 High-Side Gate-Driver Output. DH1 drives the gate of the high-side MOSFET.
Controller 1 High-Side MOSFET Source Connection/Synchronous MOSFET Drain Connection.
18
LX1
Connect the inductor and the negative side of the boost capacitor to LX1.
Controller 1 Low-Side Gate-Driver Supply. Connect externally to REG through a 1I to 4.7I resistor.
19
DREG1
Connect a minimum of 0.22FF ceramic capacitor from DREG1 to PGND1.
20
DL1
Controller 1 Low-Side Gate-Driver Output. DL1 is the gate-driver output for the synchronous MOSFET.
Controller 1 Power Ground. Connect the input filter capacitor’s negative terminal, the source of the
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PGND1
synchronous MOSFET, and the output filter capacitor’s return to PGND1. Connect to SGND at a
single point near the input capacitor return terminal.
Controller 3 Transconductance Error-Amplifier Output. Connect COMP3 to the compensation
22
COMP3
feedback network of output 3.
Controller 3 Feedback Regulation Point. Connect to the center tap of a resistive voltage-divider from
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FB3
the converter output to SGND to set the output voltage. The FB3 voltage regulates to 0.6V (typ).
Controller 3 Enable/Tracking Input. See Figure 2. When tracking (MAX15048), connect the same
resistive voltage-divider used for FB3 from output 1 to EN3 to SGND for coincident tracking. Connect
24
EN3
EN3 to analog ground for ratiometric tracking. When sequencing (MAX15049), EN3 must be above
0.6V for PWM controller 3 to start.
25
BST3
Controller 3 High-Side Gate-Driver Supply. Connect a 0.1FF ceramic capacitor from BST3 to LX3.
26
DH3
Controller 3 High-Side Gate-Driver Output. DH3 drives the gate of the high-side MOSFET.
Controller 3 High-Side MOSFET Source Connection/Synchronous MOSFET Drain Connection.
27
LX3
Connect the inductor and the negative side of the boost capacitor to LX3.
Controller 3 Low-Side Gate-Driver Supply. Connect externally to REG through a 1I to 4.7I resistor.
28
DREG3
Connect a minimum of 0.22FF ceramic capacitor from DREG3 to PGND3.
29
DL3
Controller 3 Low-Side Gate-Driver Output. DL3 is the gate-driver output for the synchronous MOSFET.
Controller 3 Power Ground. Connect the input filter capacitor’s negative terminal, the source of the
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PGND3
synchronous MOSFET, and the output filter capacitor’s return to PGND3.
Supply Input Connection. Connect to an external voltage source from 4.7V to 23V. For 4.5V to 5.5V
31
IN
input applications, connect IN and REG together.
32
REG
5V Regulator Output. Bypass with a 2.2FF ceramic capacitor to SGND.
EP
Exposed Pad. Solder the exposed pad to a large SGND plane to improve thermal dissipation.
______________________________________________________________________________________
Triple-Output Buck Controllers
with Tracking/Sequencing
Pin Description (continued)
FUNCTION
voltages are above 0.55V. For the
FB_
FB_
, for the PWM
EN-TH
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