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FR97063A

更新时间：2025-06-11 23:23:53

品牌：FITIPOWER

描述：23V, 2A, 600KHz Asynchronous Step-Down DC/DC Converter

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FR97063A 概述

23V, 2A, 600KHz Asynchronous Step-Down DC/DC Converter

FR97063A 数据手册

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fitipower integrated technology lnc.

FR97063A

23V, 2A, 600KHz Asynchronous Step-Down

DC/DC Converter

Description

Features

The FR97063A is a monolithic step-down switch

mode converter with a built-in power MOSFET. It

achieves 2A output current over a wide input supply

range with excellent load and line regulation.

Current mode operation provides fast transient

● 2A Output Current

● 180mΩ Internal Power MOSFET Switch

● Stable with Low ESR Output Ceramic Capacitors

● Up to 92% Efficiency

● Fixed 600KHz Frequency

response and eases loop stabilization.

Fault

● Current Mode Operation

condition protection includes cycle-by-cycle current

limit and thermal shutdown.

● Thermal Shutdown

● Cycle-by-Cycle Over Current Protection

● Wide 4.5V to 23V Operating Input Range

● Output Adjustable from 0.805V to 15V

● 10μA Shutdown Current

● Available in SOP-8 and MSOP-10 (Exposed Pad)

Packages

The FR97063A is available in SOP-8 and MSOP-10

(exposed pad) packages, which provides a very

compact system solution and good thermal

conductance.

Applications

● Distributed Power System

● Battery Charger

● OLPC, Netbook

● Pre-Regulator for Linear Regulator

● WLED Driver

Pin Assignments

Ordering Information

SO Package (SOP-8)

FR97063A□□□

TR: Tape/Reel

VIN

G: Green

Package Type

SO: SOP-8

GND

MP: MSOP-10 (Exposed Pad)

MP Package (MSOP-10 Exposed Pad)

VIN

GND

Figure 1. Pin Assignment of FR97063A

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Typical Application Circuit

NOT USED

6.8

VIN

22nF

4.5V to 23V

4.7μH

10μF/25V

VOUT

3.3V

CERAMIC

FR97063A^SW

(optional)

30.9KΩ/1%

47μF/6.3V

B230A

CERAMIC

OFF

GND

10KΩ/1%

Figure 2. Typical Application Circuit of FR97063A (SOP-8 package)

NOT USED

1.3.8.10

VIN

4.5V to 23V

VIN

22nF

4.7μH

10μF/25V

VOUT

3.3V

CERAMIC

FR97063A^SW

(optional)

30.9KΩ/1%

47μF/6.3V

B230A

CERAMIC

OFF

GND

10KΩ/1%

Figure 3. Typical Application Circuit of FR97063A (MSOP-10 exposed pad package)

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Functional Pin Description

Pin Name

Pin Function

Bootstrap. A 22nF capacitor is connected between SW and BS pins to drive the power switch’s gate above the

supply voltage.

Power Supply Input. Drive 4.5V to 23V voltage to this pin to power on this chip. Connect a 10μF ceramic bypass

capacitor between VIN and GND to eliminate noise.

VIN

Switch Output. Connect this pin to the switch end of the inductor.

Ground. This pin is the voltage reference for the regulated output voltage. For this reason, care must be taken in

its layout.

GND

Feedback. An external resistor divider from the output to GND, tapped to the FB pin sets the output voltage.

No Connection.

On/Off Control Input. Pull EN above 1.2V to turn the device on.

Block Diagram

OVP

Current Sense

Amplifier

VIN

0.9V

Oscillator

120KHz / 600KHz

CLK

0.45V

High-Side

MOSFET

S ^SET

Error

Amplifier

Driver

R _CLR

Current

Comparator

0.805V

GND

OVP

OTP

VIN UVLO

REGULATOR

950K

1.2V

C_COMP

Internal

Compensation

R_COMP

Figure 4. Block Diagram of FR97063A

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Absolute Maximum Ratings

● Supply Voltage V_IN--------------------------------------------------------------------------------------------- +25V

● V_SW---------------------------------------------------------------------------------------------------------------- -3V to V_IN+0.3V

● V_BS----------------------------------------------------------------------------------------------------------------- V_sw+6V

● All Other Pins Voltage ----------------------------------------------------------------------------------------- -0.3V to +6V

● Maximum Junction Temperature (T_J) --------------------------------------------------------------------- +150°C

● Storage Temperature (T_S) ----------------------------------------------------------------------------------- -65°C to +150°C

● Lead Temperature (Soldering, 10sec.) ------------------------------------------------------------------- +260°C

● Power Dissipation @T_A=25°C, (P_D)

SOP-8 ------------------------------------------------------------------------------------------------- 0.63W

MSOP-10 (Exposed Pad) ------------------------------------------------------------------------ 0.91W

● Package Thermal Resistance, (θ_JA)

SOP-8 ------------------------------------------------------------------------------------------------- 160°C/W

MSOP-10 (Exposed Pad) ------------------------------------------------------------------------ 160°C/W

Note 1：Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device.

Recommended Operating Conditions

● Supply Voltage (VIN) ------------------------------------------------------------------------------------------- +4.5V to +23V

● Output Voltage (V_OUT) ----------------------------------------------------------------------------------------- +0.805V to +15V

● Operation Temperature Range ------------------------------------------------------------------------------ -40°C to +85°C

Note 2：If out of its operation conditions, the device is not guaranteed to function.

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Electrical Characteristics

(V_IN=12V, T_A=25℃, unless otherwise specified.)

Parameter

Conditions

Min

Typ

0.805

180

Max

Unit

Feedback Voltage

4.5V ≤ V_IN≤ 23V

0.785

0.825

Switch-On Resistance (*)

Switch Leakage

mΩ

μA

V_EN= 0V, V_SW= 0V

Current Limit (*)

Oscillator Frequency

480

600

120

720

KHz

Fold-back Frequency

V_FB= 0V

Maximum Duty Cycle

Minimum On-Time (*)

100

4.4

250

Under Voltage Lockout Threshold Rising

Under Voltage Lockout Threshold Hysteresis

EN Input Low Voltage

4.1

1.2

4.7

0.4

EN Input High Voltage

V_EN= 2V

2.0

0.1

μA

EN Input Current

V_EN= 0V

Supply Current (Shutdown)

Supply Current (Quiescent)

Thermal Shutdown (*)

V_EN= 0V

μA

°C

V_EN= 2V, V_FB= 1V

1.8

150

*: Guaranteed by design

Note 3：V_IN= 5V, V_OUT= 3.3V, maximum load current is about 1.4A.

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Typical Performance Curves

V_IN= 12V, V_OUT= 3.3V, C1 = 10μF, C2 = 47μF, L1 = 4.7μH, TA = +25°C, unless otherwise noted.

90%

80%

70%

60%

50%

40%

30%

20%

10%

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

VOUT=1.2V

VOUT=1.8V

VOUT=3.3V

VOUT=5V

V_IN= 12V

V_IN= 5V

VOUT=1.2V

VOUT=1.8V

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

Load Current (A)

Figure 5. Efficiency vs. Loading

Figure 6. Efficiency vs. Loading

650

640

630

620

610

600

590

580

570

560

550

0.82

0.818

0.816

0.814

0.812

0.81

I_OUT= 0.5A

0.808

0.806

0.804

0.802

0.8

-40 -30 -20 -10

90 100

-40 -30 -20 -10

90 100

Case Temperature (℃ )

Case Temperature ( ℃ )

Figure 7. Feedback Voltage vs. Case Temperature

Figure 8. Switching Frequency vs. Case Temperature

I_OUT= 0.1A

I_OUT= 2A

V_IN200mV/div.

V_IN50mV/div.

V_OUT10mV/div.

I_L1A/div.

V_SW5V/div.

1μs/div.

Figure 9. DC Ripple Waveform

Figure 10. DC Ripple Waveform

FR97063A-1.1-MAR-2012

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FR97063A

Typical Performance Curves (Continued)

V_IN= 12V, V_OUT= 3.3V, C1 = 10μF, C2 = 47μF, L1 = 4.7μH, TA = +25°C, unless otherwise noted.

I_OUT= 0.1A

I_OUT= 2A

V_EN,5V/div.

V_OUT1V/div.

I_L1A/div.

V_OUT1V/div.

I_L1A/div.

V_SW10V/div.

80μs/div.

Figure 11. Startup Through Enable Waveform

Figure 12. Startup Through Enable Waveform

I_OUT= 2A

I_OUT= 0.1A

V_EN,5V/div.

V_OUT1V/div.

I_L1A/div.

V_OUT1V/div.

I_L1A/div.

V_SW10V/div.

1ms/div.

80μs/div.

Figure 13. Shutdown Through Enable Waveform

Figure 14. Shutdown Through Enable Waveform

V_OUT1V/div.

I_L1A/div.

40μs/div.

20μs/div.

Figure 15. Short Circuit Test Waveform

Figure 16. Short Circuit Recovery Waveform

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Typical Performance Curves (Continued)

V_IN= 12V, V_OUT= 3.3V, C1 = 10μF, C2 = 47μF, L1 = 4.7μH, TA = +25°C, unless otherwise noted.

I_OUT= 100mA to 2A step

V_{OUT ,,}200mV/div.

I_L1A/div.

400μs/div.

Figure 17. Load Transient Waveform

FR97063A-1.1-MAR-2012

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FR97063A

Application Information

Setting EN Automatic Startup Voltage

Table 2 —Resistor Selection for Common

Output Voltages

VIN

V_OUT

43kΩ

8.2kΩ

10kΩ

FR97063A

3.3V

2.5V

1.8V

30.9kΩ

21kΩ

950K?

12.4kΩ

The external resistor divider is used to set the EN

automatic startup voltage:

Selecting the Inductor

A 4.ꢄμH inductor with a DC current rating of at least

25% percent higher than the maximum load current

is recommended for most applications. For the

highest efficiency, the inductor’s DC resistance

should be less than 200mΩ. For most designs, the

required inductance value can be derived from the

following equation.

V_Eꢁ

R4ꢀ

V_IꢁꢂV

^Eꢁꢀ

For example, V_IN=12V, R3=100KΩ, thus R4 resistor

value is:

ꢈIꢀ0.3ꢆI_ꢉ(MAꢊꢋ

R4ꢀ

ꢃꢄ1.5kΩ

12Vꢂ5V

100kΩ

ꢀ

V_OꢅT

ꢁ

ꢂ

ꢉꢌ V_IꢁꢂV_OꢅTꢆ

ꢀ

F_SWꢆꢈIꢆV_Iꢁ

Table 1 shows a list of resistor selection for common

input voltages:

Where ΔI is the inductor ripple current.

Choose the inductor ripple current to be 30% of the

maximum load current. The maximum inductor

peak current is calculated from:

Table 1 -- Resistor Selection for Common

Input Voltages

VIN

ꢈI_ꢉ

100kΩ

I_ꢉ(MAꢊꢋꢀI_ꢉOAD

ꢇ

12V

16V

71.5kΩ

45.3kΩ

Under light load conditions below 100mA, a larger

inductance is recommended for improving

efficiency.

Setting Output Voltage

The external resistor divider is used to set the output

voltage. FR97063A feedback resistors are

unconcerned of compensation and provide an easy

way to program output voltage. Table 2 shows a list

of resistor selection for common output voltages:

Selecting the Input Capacitor

The input capacitor reduces the surge current

drawn from the input supply and the switching noise

from the device. The input capacitor impedance at

the switching frequency should be less than the

input source impedance to prevent high frequency

switching current from passing through the input.

Ceramic capacitors with X5R or X7R dielectrics are

highly recommended because of their low ESR and

V_OꢅTꢀ0.805ꢆ 1ꢇ ꢀ V

small

temperature

coefficients.

For

most

applications, 10μF capacitor is sufficient.

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Application Information (Continued)

Selecting the Output Capacitor

5. The exposed pad of the package should be

soldered to an equivalent area of metal on the

PCB. This area should connect to the GND

plane and have multiple via connections to the

back of the PCB as well as connections to

intermediate PCB layers. The GND plane area

which connects to the exposed pad should be

maximized to improve thermal performance.

(Figure 6)

The output capacitor keeps the output voltage

ripple small, and a 47μF ceramic capacitor with

X5R or X7R dielectrics is recommended for its low

ESR characteristics.

External Bootstrap Diode

An external bootstrap diode is recommended if the

input voltage is less than 5V or there is a 5V system

rail available. This diode helps improving the

efficiency. Low cost diodes, such as 1N4148, are

suitable for this application.

1N4148

GND

VIN

V^IN

FR97063A

VIN

VOUT

Rectifier Diode

Figure 18. Recommended Layout Diagram (SOP-8 package)

Use a Schottky diode as the rectifier to conduct

current when the high-side power MOSFET is off.

The Schottky diode must have current rating higher

than the maximum output current and the reverse

voltage rating higher than the maximum input

voltage.

Exposed

Pad

GND

PCB Layout Recommendation

The device’s performance and stability are

dramatically affected by PCB layout.

It is

recommended to follow these general guidelines

shown as below:

VIN

VOUT

1. Place the input capacitors and output

capacitors as close to the device as possible.

The traces which connect to these capacitors

should be as short and wide as possible to

minimize parasitic inductance and resistance.

Figure 19. Recommended Layout Diagram (MSOP-10 exposed

pad package)

2. Place V_INbypass capacitors close to the V_INpin.

3. Place feedback resistors close to the FB pin.

4. Keep the sensitive signal (FB) away from the

switching signal (SW).

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Outline Information

SOP-8 Package (Unit: mm)

DIMENSION IN MILLIMETER

SYMBOLS

UNIT

MIN

MAX

1.35

1.75

0.10

1.25

0.31

4.80

3.80

1.20

5.80

0.40

0.25

1.50

0.51

5.00

4.00

1.34

6.20

1.27

Note：Followed From JEDEC MO-012-E

Carrier Dimensions

FR97063A-1.1-MAR-2012

fitipower integrated technology lnc.

FR97063A

Outline Information (Continued)

MSOP-10 (Exposed Pad) Package (Unit: mm)

DIMENSION IN MILLIMETER

SYMBOLS

UNIT

MIN

0.75

0.00

0.75

0.17

2.90

4.80

2.90

0.40

0.75

MAX

1.10

0.15

0.95

0.30

3.10

5.00

3.10

0.60

0.80

2.50

Note：Followed From JEDEC MO-187-E.

Carrier Dimensions

Life Support Policy

Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems.

FR97063A-1.1-MAR-2012

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