EN2360QI Datasheet, PDF(16/24 Page) Enpirion, Inc. – 6A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor

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EN2360QI Datasheet, PDF (16/24 Pages) Enpirion, Inc. – 6A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor

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Thermal Overload Protection

Thermal shutdown circuit will disable device

operation when the junction temperature exceeds

approximately 150ÂºC. After a thermal shutdown

event, when the junction temperature drops by

approx 20ÂºC, the converter will re-start with a

normal soft-start.

EN2360QI

Input Under-Voltage Lock-Out (UVLO)

Internal circuits ensure that the converter will not

start switching until the input voltage is above the

specified minimum voltage. Hysteresis, input de-

glitch and output leading edge blanking ensures

high noise immunity and prevents false UVLO

triggers.

Application Information

Output Voltage Programming and Loop

Compensation

The EN2360QI uses a Type IV Voltage Mode

compensation network. Type IV Voltage Mode

control is a proprietary Enpirion control scheme that

maximizes control loop bandwidth to deliver

excellent load transient responses and maintain

output regulation with pin point accuracy. For ease

of use, most of this network has been customized

and is integrated within the device package. The

EN2360QI output voltage is programmed using a

simple resistor divider network (RA and RB). The

feedback voltage at VFB is nominally 0.6V. RA is

predetermined based on Table 5 and RB can be

calculated based on Figure 10. The values

recommended for COUT, CA, RCA and REA make up

the external compensation of the EN2360QI. It will

vary with each PVIN and VOUT combination to

optimize on performance. The EN2360QI solution

can be optimized for either smallest size or highest

performance. Please see Table 5 for a list of

recommended RA, CA, RCA, REA and COUT values for

each solution.

Figure 8: VOUT Resistor Divider & Compensation

Components. See Table 5 for details.

Input Capacitor Selection

The EN2360QI requires a 22ÂµF/1206 input

capacitor. Low-cost, low-ESR ceramic capacitors

should be used as input capacitors for this

converter. The dielectric must be X5R or X7R

rated. Y5V or equivalent dielectric formulations

must not be used as these lose too much

capacitance with frequency, temperature and

bias voltage. In some applications, lower value

capacitors are needed in parallel with the larger,

capacitors in order to provide high frequency

decoupling. Table 3 contains a list of

recommended input capacitors.

Recommended Input Capacitors

Description

22ÂµF, 16V,

X5R, 10%,

1206

22ÂµF, 16V,

X5R, 20%,

1206

MFG

Murata

Taiyo Yuden

P/N

GRM31CR61C226ME15

EMK316ABJ226ML-T

Table 3: Recommended Input Capacitors

Output Capacitor Selection

As seen from Table 5, the EN2360QI has been

optimized for use with one 100ÂµF/1206 plus two

47ÂµF/1206 output capacitors for best performance.

For the smallest solution size configuration see

Table 5. Low ESR ceramic capacitors are required

with X5R or X7R rated dielectric formulation. Y5V

or equivalent dielectric formulations must not

be used as these lose too much capacitance

with frequency, temperature and bias voltage.

Table 4 contains a list of recommended output

capacitors

Output ripple voltage is determined by the

aggregate output capacitor impedance. Capacitor

impedance, denoted as Z, is comprised of

capacitive reactance, effective series resistance,

ESR, and effective series inductance, ESL

reactance.

Placing output capacitors in parallel reduces the

impedance and will hence result in lower ripple

voltage.

07514

Enpirion Confidential

September 17, 2012

www.enpirion.com, Page 16

Rev: A

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