Datasheet > ISL97516

ISL97516

更新时间： 2023-12-20 18:45:20

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
9页	704K
描述
600kHz/1.2MHz PWM Step-Up Regulator

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ISL97516 数据手册

ISL97516

Typical Performance Curves (Continued)

JEDEC JESD51-7 HIGH EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD

= 50mA TO 300mA

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

= 12V

870mW

= 3.3V

= 1.2MHz

75 85 100

125

AMBIENT TEMPERATURE (°C)

FIGURE 8. TRANSIENT RESPONSE

FIGURE 9. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

JEDEC JESD51-3 LOW EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD

0.6

0.5

0.4

0.3

0.2

0.1

0.0

486mW

75 85 100

125

AMBIENT TEMPERATURE (°C)

FIGURE 10. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE

as shown in Figure 12, the internal power FET turns on and the

Schottky diode is reverse biased and cuts off the current flow

to the output. The output current is supplied from the output

Applications Information

The ISL97516 is a high frequency, high efficiency boost

regulator operated at constant frequency PWM mode. The

boost converter stores energy from an input voltage source

and deliver it to a higher output voltage. The input voltage

range is 2.3V to 5.5V and output voltage range is 5V to 25V.

The switching frequency is selectable between 600kHz and

1.2MHz allowing smaller inductors and faster transient

response. An external compensation pin gives the user greater

flexibility in setting output transient response and tighter load

regulation. The converter soft-start characteristic can also be

capacitor. The voltage across the inductor is V and the

inductor current ramps up in a rate of V /L, L is the

inductance. The inductance is magnetized and energy is stored

in the inductor. The change in inductor current is shown in

Equation 1:

---------

I

= t1 

----------

t1 =

controlled by external C capacitor. The EN pin allows the

user to completely shutdown the device.

D = Duty Cycle

Boost Converter Operations

Figure 11 shows a boost converter with all the key

components. In steady state operating and continuous

conduction mode where the inductor current is continuous, the

boost converter operates in two cycles. During the first cycle,

OUT

---------------

V

 t

OUT

(EQ. 1)

FN9261 Rev 6.00

March 28, 2014

Page 5 of 9

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