MAX17020ETJ+ Maxim Integrated Products, MAX17020ETJ+ Datasheet - Page 15

• Manufacturer Part Number: MAX17020ETJ+
• Description: IC CTLR PWM DUAL STEP DN 32-TQFN
• Manufacturer: Maxim Integrated Products
• Series: Quick-PWM™r
• Type: Dual Quick-PWM Step-Down Controllerr

Specifications of MAX17020ETJ+

• Applications: Power Supplies
• Current - Supply: 1mA
• Voltage - Supply: 6 V ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Output Voltage Range: 0.7 V to 5.5 V
• Input Voltage Range: 6 V to 24 V
• Input Current: 1 mA
• Power Dissipation: 2.76 W
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN
26
27
28
29
30
31
32
—
PGOOD2
REFIN2
NAME
OUT2
ILIM2
ON2
DH2
EP
______________________________________________________________________________________
High-Side Gate-Driver Output for SMPS2. DH2 swings from LX2 to BST2.
Enable Input for SMPS2. Drive ON2 high to enable SMPS2. Drive ON2 low to shut down SMPS2.
Open-Drain Power-Good Output for SMPS2. PGOOD2 is low when the output voltage is more than 150mV
(typ) below the REFIN2 voltage or more than 16% below the preset voltage, during soft-start, in shutdown,
and when the fault latch has been tripped. After the soft-start circuit has terminated, PGOOD2 becomes high
impedance if the output is in regulation. PGOOD2 is blanked—forced high-impedance state—when a
dynamic REFIN transition is detected.
Pulse-skipping Control Input. This three-level input determines the operating mode for the switching
regulators:
Output Voltage-Sense Input for SMPS2. OUT2 is an input to the Quick-PWM on-time one-shot timer. OUT2
also serves as the feedback input for the preset 3.3V (REFIN2 = V
Valley Current-Limit Adjustment for SMPS2. The GND - LX2 current-limit threshold is 1/10 the voltage present
on ILIM2 over a 0.2V to 2V range. An internal 5µA current source allows this voltage to be set with a single
resistor between ILIM2 and analog ground.
External Reference Input for SMPS2. REFIN2 sets the feedback-regulation voltage (V
MAX17020 includes an internal window comparator to detect when the REFIN2 voltage changes, allowing the
controller to blank PGOOD2 and the fault protection. Connect REFIN2 to RTC for fixed 1.05V operation.
Connect REFIN2 to V
Exposed Pad. Connect the backside exposed pad to AGND.
High (V
Open/REF (2V) = Ultrasonic mode
GND = Pulse-skipping mode
Dual Quick-PWM Step-Down Controller
with Low-Power LDO, RTC Regulator
CC
) = Forced-PWM operation
CC
for fixed 3.3V operation.
FUNCTION
Pin Description (continued)
CC
) and 1.05V (REFIN2 = RTC).
OUT2
= V
REFIN2
). The
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