Fujitsu MB3788 User Manual

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FUJITSU SEMICONDUCTOR

DATA SHEET

ASSP

SWITCHING REGULATOR CONTROLLER

MB3788

DESCRIPTION

■■■■

The MB3788 is a dual-channel PWM-type switching regulator controller; it incorporates a reference voltage. The MB3788 has a PWM circuit and an output circuit as well as a reference v o ltage po w er supply with a voltage accuracy of ±1%. The maximum operating frequency is 1 MHz. It is designed f or a voltage-drop output s witching regulator suitable for a logic power supply or speed control of a DC motor. The MB3788 is compatible with all master ICs producing triangular wav es, sa w-tooth w a v es and sine wa v es with an amplitude of 1.3 V to 1.9 V. It can be used in high-performance portable equipment such as a video camcorder or notebook personal computer (word processor).

DS04-27209-3E

FEATURES

■■■■

• Wide operating power supply voltage range: 3.6 V to 18 V

• Low power dissipation

• Operating: 1.9 mA (standard) Standby: 10 µA Max

(Continued)

PACKAGE

■■■■

24-pin Plastic SSOP

(FPT-24P-M03)

This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields. Howe ver, it is advised that normal precautions be taken to avoid application of any v oltage higher than maxim um rated v oltages to this high impedance circuit.

MB3788

(Continued)

• High-frequency operation: 100 kHz to 1 MHz

• On-chip timer and latch-type short-circuit detection circuit

• Wide error amplifier input voltage range: -0.2 V to V

• On-chip high-accuracy reference voltage circuit: 2.50 V ±1%

• Output circuit PNP transistor drive output pin: Push-pull type ON/OFF current values set independently

• On-chip standby function and output control function

• High-density packaging: SSOP-24P

PIN ASSIGNMENT

■■■■

(TOP VIEW)

CC(out)

OUT1

VE1 Cb1 Ca1 FB1

-IN1(E)

+IN1(E)

-IN1(C)

-IN(PWN) V

VREF

1 2 3 4 5 6 7 8

9 10 11 12

- 1.8 V

24 23 22 21 20 19 18 17 16 15 14 13

GND OUT2 VE2 Cb2 Ca2 FB2

-IN2(E) +IN2(E)

-IN2(C) SCP CTL2 CTL1

(FPT-24P-M03)

PIN DESCRIPTION

■■■■

Pin No. Pin name I/O Descriptions

MB3788

Channel 1

Channel 2

2OUT1O 3VE1I 4Ca1— 5Cb1— 6FB1O 7-IN1(E)I 8+IN1(E)

9-IN1(C)I 16 -IN2(C) I 17 +IN2(E) I 18 -IN2(E) I 19 FB2 O 20 Ca2 — 21 Cb2 — 22 VE2 I 23 OUT2 O

13 CTL1 I

Channel 1 push-pull type output Channel 1 output current setting

Channel 1 output transistor OFF current setting: Output transistor OFF The current is set by connecting a capacitor between pins Ca1 and Cb1.

Channel 1 error amplifier output Channel 1 error amplifier inversion input Channel 1 error amplifier non-inversion input Channel 1 comparator inversion input Channel 2 comparator inversion input Channel 2 error amplifier non-inversion input Channel 2 error amplifier inversion input Channel 2 error amplifier output

Channel 2 output transistor OFF current setting: Output transistor OFF The current is set by connecting a capacitor between pins Ca2 and Cb2.

Channel 2 output current setting Channel 2 push-pull type output Power and channel 1 control pin

H level: Power and channel 1 operating L level: Standby

Control

circuit

Power

circuit

14 CTL2 I

15 SCP —

10 -IN(PWM) I 11 VCC1 — 12 VREF O 24 GND —

Channel 2 control pin When CTL1 pin = H level, H level: Channel 2 operating L level: Channel 2 OFF

Short-circuit protection circuit capacitor connection Output circuit power pin

—

Master oscillating waveform input Reference power and control circuit power Reference voltage output Ground

Note: The alphabetic characters in parenthesis above indicate the following input pins.

(C): Comparator (E): Error amplifier

MB3788

BLOCK DIAGRAM

■■■■

+IN1 (E)

-IN1 (E)

-IN1 (C)

+IN2 (E)

-IN2 (E)

-IN2 (C)

FB1

FB2

0.6 V

Channel 1

Error amplifier 1

Comparator 1

Channel 2

Error amplifier 2

Comparator 2

PWM comparator 1

PWM comparator 2

OFF current setting

1.5 V

20 21

Cb1

Ca1

CC(out)

OUT1

VE1

Ca2

Cb2

OUT2

VE2

Timer circuit

SCP

1 µA

SCP comparator

SR latch

circuit

VREF

2.1 V

Low input

voltage

protection

circuit

10 12

-IN(PWM)

Reference

voltage

power (2.5 V)

REF

1.9 V

1.3 V

Power/channel

ON/OFF

circuit

GND

CTL2

CTL1

MB3788

FUNCTIONAL DESCRIPTION

■■■■

1. Major Functions

(1) Reference voltage power circuit

The reference voltage po wer supply produces a reference v oltage (≈ 2.50 V) which is temperature-compensated by the voltage supplied from the power pin (pin 11); it is used as the IC internal circuit operating power supply. The reference voltage can also be output externally at 1 mA from V

(2) Error amplifier

The error amplifier detects the switching regulator output voltage and outputs a PWM control signal. It has a wide in-phase input voltage range of -0.2 V to V

Connecting the output pin and inversion input pin of the error amplifier through a f eedback resistor and capacitor allows setting of any loop gain to provide stable phase compensation.

(3) PWM comparator

The PWM comparator controls the output pulse ON time according to the input voltage. The voltage input to the -IN pin (PWM) turns the output transistor on when it is lower than the output v oltage of

the error amplifier.

(4) Output circuit

- 1.8 V to make setting from an external power supply easy.

REF

pin (pin12).

The output circuit is configured in a push-pull form and uses a PNP transistor drive system to drive a transistor of up to 30 mA. (See

How to Set Output Current.

)

2. Channel Control Function

Channels can be set ON/OFF by combining the voltage levels at pin CTL1 (pin 13) and pin CTL2 (pin 14).

Channel ON/OFF Setting Conditions

Voltage level at CTL pin Channel ON/OFF status

CTL1 CTL2 Power circuit Channel 1 Channel

L × Stand by state*

LOFF

*: The power current in the standby state is 10 µA Max.

MB3788

3. Protection Functions

(1) Timer and latch-type short-circuit protection circuit

The SCP comparator detects the output voltage levels of two comparators to detect an output short circuit. If the output voltage of one comparator increases to 2.1 V, the transistor of the timer circuit is turned off and the short circuit protection capacitor connected externally to the SCP pin (pin 15) starts charging.

The latch circuit turns off the output transistor and simultaneously clears the duty cycle to 0 when the output voltage lev el of the comparator does not return to the normal voltage lev el until the capacitor v oltage rises to the base-emitter junction voltage VBE (≈ 0.65 V) of the transistor . (See

Type Short-Circuit Protection Circuit.

When the protection circuit operates, recycle the power to reset the circuit.

(2) Low input voltage malfunction fail-safe circ uit

A transient at power-on, or an instantaneous supply v oltage drop can cause a control IC malfunction, which may damage the system. The low input voltage malfunction fail-safe circuit detects the internal reference voltage level based on the supply voltage level, resets the latch circuit, turns off the output transistor, clears the duty cycle to 0 and holds the SCP pin (pin 15) at Low level. All circuits are recovered when the supply voltage is greater than the threshold voltage of the fail-safe circuit.

)

How to Set Time Constant for Timer & Latch-

■ ABSOLUTE MAXIMUM RATINGS

MB3788

= +25°C)

Parameter Symbol Conditions

Unit

Min Max

Ratings

Supply voltage V Control input voltage V Allowable loss P Operating ambient temperature T Storage temperature T

ICTL

D OP stg

—— ——

Ta ≤ +25°C

— —

—

-30 +85 °C

-55 +125 °C

20 V 20 V

500* mW

*: Value obtained when mounted on 4 cm × 4 cm double-sided epoxy substrate WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,

temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.

■ RECOMMENDED OPERATING CONDITIONS

= +25°C)

Parameter Symbol Conditions

Supply voltage V Reference voltage output current I

Min Typ Max

—3.66.018V —-1—0mA

Values

Unit

Error amplifier input voltage V Error amplifier input voltage V Control input voltage V Output current I Operating frequency f Operating ambient temperature T

I I

ICTL

osc

—-0.2—V —-0.2—VCCV —-0.2—18V —3.0—30mA — 100 300 1000 kHz — -30 25 85 °C

- 1.8 V

WARNING: The recommended operating conditions are required in order to ensure the normal operation of the

semiconductor device. All of the device’s electrical characteristics are warranted when the device is operated within these ranges.

Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure.

No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand.

MB3788

ELECTICAL CHARACTERISTICS

■■■■

(VCC =6V, TA = +25°C)

Reference

voltage

Low voltage

malfunction

fail-safe

circuit

Short-circuit

detection

comparator

Short-circuit

detector

Parameter Symbol Conditions

∆V

REF

tH tL HYS R IO

ICM tPC STB I

= -1 mA

TA = -30° to +85°C-2±0.2 2 %

= 3.6 V to 18 V — 2 10 mV

= -0.1 mA to 1 mA — 3 10 mV

REF

= 2 V -20 -8 -3 mA

VI = 0 V -200 -100 — nA

Reference voltage V Output voltage temperature

variation Input stability Line V Load stability Load I Short-circuit output current I

Threshold voltage

Hysteresis width V Reset voltage V Input offset voltage V Input bias current I In-phase input voltage range V Threshold voltage V Input standby voltage V Input latch voltage V

Value

Unit

Min Typ Max

2.475 2.500 2.525 V

——2.65—V ——2.45—V —80200—mV —1.51.9—V — 0.58 0.65 0.72 V

—-0.2—V — 0.60 0.65 0.70 V — — 50 100 mV — — 50 100 mV

-1.8 V

Error

amplifier

Input source current I Input offset voltage V Input offset current I Input bias current I In-phase input voltage range V Voltage gain A

Ibpc

IO IO IB

ICM

— -1.4 -1.0 -0.6 µA VFB = 1.6 V -10 — 10 mV VFB = 1.6 V -100 — 100 nA VFB = 1.6 V -200 -60 — nA

—-0.2—V

-1.8 V

—60100—dB

Frequency bandwidth BW AV = 0 dB — 800 — kHz In-phase signal rejection ratio CMRR — 60 80 — dB

OM+

—V

REF

-0.3 2.4 — V

Maximum output voltage width

OM-

Output sink current I Output source current I

OM+ OM-

VFB = 1.6 V — 120 — µA

FB =

— — 0.05 0.5 V

1.6 V — -2 — mA

(Continued)

PWM

comparator

Parameter Symbol Conditions

Threshold voltage

Input sink current I Input source current I

V V

IM+ IM-

t100

Duty cycle = 0 % 1.05 1.3 — V Duty cycle = 100 % — 1.9 2.25 V

MB3788

Values

Unit

Min Typ Max

——120—µA ——-2—mA

Control

Output

All devices

Input bias current I Threshold voltage V

Input current

Source current I Sink current I Output leak current I Standby current I Power current at output OFF I

O O LO CCO CC

VI = 0 V -1.0 -0.5 — µA

— 0.7 1.4 2.1 V

CTL

= 5 V — 100 200 µA

CTL

= 0 V -10 — 10 µA

——-40—mA RB = 50 Ω 18 30 42 mA VO = 18 V — — 20 µA

——010µA

——1.92.7mA

MB3788

■ STANDARD CHARACTERISTIC CURVES

1. Power current - supply voltage characteristic 2. Reference voltage - supply voltage characteristic

2.5

2.0 CTL1, 2 = 6 V

Power

1.5

current

CC (mA)

1.0

0.5

048121620

Supply voltage V

CC (V)

3.Reference voltage, output current setting pin v oltage

- supply voltage characteristic

VREF

Reference

voltage

REF (V)

012345

Supply voltage V

CC (V)

TA = +25°C

CTL1 = 6 V

TA = +25°C

Reference

voltage

REF (V)

Output current

setting pin voltage

E (V)

TA = +25°C

0 4 8 12 16 20

Supply voltage V

CC (V)

4. Reference voltage - ambient temperature characteristic

2.56

Reference

voltage

REF (V)

2.54

2.52

VCC = 6 V

CTL1, 2 = 6 V OR = -1 mA

2.50

2.48

2.46

2.44

-60 -40 -20 0 20 40 60 80 100 Ambient temperature T

A (°C)

Reference

voltage

REF (V)

5. Reference voltage - control voltage characteristic 6. Control current - control voltage characteristic VCC = 6 V

3.0

2.8

A = +25°C

500

400

Control

2.6

2.4

2.2

2.0 012345

Control voltage VCTL1 (V)

current

lCTL1 (µA)

300

200

100

048 121620

Control voltage V

CTL1 (V)

VCC = 6 V

A = +25°C

(Continued)

MB3788

100

Duty

Dtr (%)

Power dissipation P

D (mW)

7. Duty - input oscillating frequency characteristic

Input waveform

1.9V

1.3V

0 5K 10K 50K 100K 500K 1M

Input oscillating frequency (Hz)

9. Power dissipation - ambient temperature characteristic

1000

800

600

400

200

VCC = 6 V

FB = 1.6 V

A = +25°C

8.Gain - frequency characteristic and phase - frequency

Gain (dB)

-20

-40 1K 10K 100K 1M 5M 10M

Circuit for measuring gain - frequency characteristic and

phase - frequency characteristic

10 µF

4.7 kΩ

2.5 V

4.7 kΩ4.7 kΩ

4.7 kΩ

characteristic

TA = +25°C

f (Hz)

2.5 V 240 kΩ

Error amplifier

180

-90

-180

CC = 6 V

Phase φ (deg)

out

-20 020 406080 100 Ambient temperature T

A (°C)

MB3788

HOW TO SET OUTPUT VOLTAGE

■■■■

VREF

VOUT

REF

OUT = (R1 + R2)

2 × R2

RNF

Note: Set the output voltage in the positive range (VOUT > 0).

MB3788

HOW TO SET OUTPUT CURRENT

■■■■

The output circuit is configured in a push-pull type as shown in Figure 1. The ON current value of the output current wav eform shown in Figure 2 is a constant current and the OFF v alue set by RE is set b y a time constant. Each output current can be calculated from the following expression:

• ON current = 1.5/R

• The OFF current time constant is proportional to the value of CB.

E (A) (Output current setting pin voltage: VE ≈ 1.5 V)

Drive Tr

OFF current

setting part

Fig.1 Output Circuit Diagram

OFF

current

ON current

Output

current

ON current

OFF current

Fig.2 Output Current Waveform

Fig.3 Output Pin Voltage and Current Waveforms (Channel 1)

1000 pF

4 5

MB3788

VCC

Iout

1000 pF

150 Ω

Vout

Fig.4 Measurement Circuit Diagram

22 µH

10 µF

-IN1 (C)

(5 V)

8.2 kΩ

2.7 kΩ

-IN1 (E)

MB3788

HOW TO SET TIME CONSTANT FOR TIMER & LATCH-TYPE SHORT-CIRCUIT

■■■■

PROTECTION CIRCUIT

If the load conditions of the switching regulator are stable, the outputs of comparators 1 and 2 do not change, so the SP comparator outputs a High level. At this time, the SCP pin (pin 15) is held at about 50 mV.

If the load conditions change suddenly due to a load short-circuit, for example, the output voltage of the comparator of the channel becomes a High-level signal (more than 2.1 V). Then, the SVP comparator outputs a Low level and transistor Q1 is turned off. The short-circuit protection capacitor C SCP pin starts to charge.

PE = 50 mV + tPE × 10

-6

/CPE

0.65 = 50 mV + tPE × 10-6/CPE CPE = tPE /0.6 (s)

PE externally connected to the

Once the capacitor C

PE is charged to about 0.65 V, the SR latch is set and the output drive transistor is turned

off. At this time, the duty cycle is made lo w and the output voltage of the SCP pin (pin 15) is held at Low level. This closes the SR latch input to discharge C

Comparator 1 Comparator 2

2.1 V

PE.

2.5 V

1 µA

CPE

SR latch-type

circuit

Low

input

voltage

protection

circuit

PWM

comparator

OUT

Fig. 5 Latch-Type Short-Circuit Protection Circuit

MB3788

PROCESSING WITHOUT USING SCP PIN

■■■■

If the timer and latch-type short-circuit protection circuit is not used, connect the SCP pin (pin 15) to GND as close as possible. Also, connect the input pin of each channel comparator to the V

-IN1 (C)

CC pin (pin 11).

-IN2 (C)

SCP

GND

Fig. 6 Processing without using SCP Pin

MB3788

EQUIVALENT SERIES RESISTANCE OF SMOOTHING CAPACITOR AND STABILITY OF

■■■■

DC/DC CONVERTER

The equivalent series resistance (ESR) of the smoothing capacity in a DC/DC converter has a great effect on the loop phase characteristics.

The ESR causes a small delay at the capacitor with a series resistance of 0 (Figures 8 and 9), thus improving system stability. On the other hand, using a smoothing capacitor with a low ESR reduces system stability. Therefore, attention should be paid to using semiconductor electrolytic capacitors (such as OS capacitors) or tantalum capacitors with a low ESP. (Phase margin reduction by using an OS capacitor is explained on the next page.)

Gain

(dB)

-20

RLVIN D

Fig. 7 Basic Voltage-Drop Type DC/DC Converter Circuit

Phase

(2)

-90

(deg)

(2)

-40 (1): RC = 0 Ω

(2): R

C = 31 mΩ

-60

10 100 1k 10k 100k

Frequency f (Hz)

(1)

Fig.8 Gain - Frequency Characteristic

(1): RC = 0 Ω (2): R

-180

10 100 1k 10k 100k

C = 31 mΩ

Frequency f (Hz)

(1)

Fig.9 Phase - Frequency Charecteristic

MB3788

(Reference Data)

The phase margin is halved by changing the smoothing capacitor from an aluminum electrolytic capacitor (Rc = 1.0 Ω) to a semiconductor electrolytic capacitor (OS capacitor: Rc = 0.2 Ω) with a low ESR (Figures 11 and 12).

OUT

VO+

CNF

Error amplifier

Fig. 10 DC/DC Converter A

Aluminum electrolytic capacitor gain - frequency and phase - frequency characteristics (DC/DC converter +5 V output)

Gain

(dB)

-20

-40 101001 k10 k 100 k

Frequency f (Hz)

VREF/2

62°

+IN

φφφφ

Characteristic Measurement Diagram

VCC = 10 V

RL = 25 Ω

CP = 0.1 µF

ϕ⇒

AV - φ characteristic between VOUT and VIN

180

-90

-180

Phase

(deg)

Aluminum electrolytic capacitor

220 µF (16 V)

Rc ≈ 1.0 Ω: f

O+

GND

OSC = 1 kHz

OS capacitor gain - frequency and phase - frequency characteristics (DC/DC converter +5 V output)

Gain

(dB)

-20

-40 101001 k10 k 100 k

Fig. 11 Gain - Frequency Characteristic

Frequency f (Hz)

VCC = 10 V

RL = 25 Ω

CP = 0.1 µF

ϕ⇒

27°

180

-90

-180

Phase

(deg)

Fig.12 Phase - Frequency Characteristic Curves

OS capacitor

22 µF (16 V)

Rc ≈ 1.2 Ω: f

OSC = 1 kHz

O+

GND

MB3788

APPLICATION CIRCUIT

■■■■

10 µH

33 µF

(a)

(b)

8.2 kΩ

2.7 kΩ

3.8 kΩ

2.7 kΩ

4.7 kΩ

0.22 µF

4.7 kΩ

0.22 µF

CTL1

100 kΩ

+IN1 (E)

-IN1 (E)

FB1

-IN1 (C)

+IN2 (E)

-IN2 (E)

FB2

-IN2 (C)

CTL2

Channel 1

(dB)

Channel 2

(deg)

CC(out)

OUT1

OUT2

Cb1

Ca1

VE1

Ca2

Cb2

VE2

150 Ω

1000 pF

(15 mA)

(b)

(a)

22 µH

5 V

10 µF

3 V

10 µF

0.1 µF Triangular wave signal

<MB3785A-used DC/DC converter>

GND-IN(PWM)SCPVREF

⇑

1.9 V

1.3 V

+15 V

+24 V

DC motor 1

DC motor 2

MB3788

NOTES ON USE

■■■■

• Take account of common impedance when designing the earth line on a printed wiring board.

• Take measures against static electricity.

- For semiconductors, use antistatic or conductive containers.

- When storing or carrying a printed circuit board after chip mounting, put it in a conductive bag or container.

- The work table, tools and measuring instruments must be grounded.

- The worker must put on a grounding device containing 250 kΩ to 1 MΩ resistors in series.

• Do not apply a negative voltage

- Applying a negative voltage of −0.3 V or less to an LSI may generate a parasitic transistor, resulting in malfunction.

ORDERING INFORMATION

■■■■

Part number Package Remarks

MB3788PFV 24-pin Plastic SSOP

(FPT-24P-M03)

MB3788

PACKAGE DIMENSION

■■■■

24-pin plastic SSOP

(FPT-24P-M03)

Note 1) *1 : Resin protrusion. (Each side : +0.15 (.006) Max) . Note 2

) *2 : These dimensions do not include resin protrusion.

Note 3

) Pins width and pins thickness include plating thickness.

Note 4

) Pins width do not include tie bar cutting remainder.

7.75±0.10(.305±.004)

INDEX

112

0.65(.026)

2003 FUJITSU LIMITED F24018S-c-4-5

0.24 .009

0.10(.004)

+0.08 –0.07

+.003 –.003

0.13(.005)

1324

5.60±0.10 7.60±0.20

(.220±.004) (.299±.008)

0.17±0.03

(.007±.001)

"A"

Details of "A" part

+0.20 –0.10

1.25

+.008 –.004

.049

0.25(.010)

0~8˚

0.50±0.20

(.020±.008)

0.60±0.15

(.024±.006)

(Mounting height)

0.10±0.10

(.004±.004)

(Stand off)

Dimensions in mm (inches) . Note : The values in parentheses are reference values.

MB3788

FUJITSU LIMITED

The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in this document are presented solely for the purpose of reference to show examples of operations and uses of Fujitsu semiconductor device; Fujitsu does not warrant proper operation of the device with respect to use based on such information. When you develop equipment incorporating the device based on such information, you must assume any responsibility arising out of such use of the information. Fujitsu assumes no liability for any damages whatsoever arising out of the use of the information. Any information in this document, including descriptions of function and schematic diagrams, shall not be construed as license of the use or exercise of any intellectual property right, such as patent right or copyright, or any other right of Fujitsu or any third party or does Fujitsu warrant non-infringement of any third-party’s intellectual property right or other right by using such information. Fujitsu assumes no liability for any infringement of the intellectual property rights or other rights of third parties which would result from the use of information contained herein. The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for use accompanying fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for use requiring extremely high reliability (i.e., submersible repeater and artificial satellite). Please note that Fujitsu will not be liable against you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products. Any semiconductor devices have an inherent chance of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Law of Japan, the prior authorization by Japanese government will be required for export of those products from Japan.

F0309

FUJITSU LIMITED Printed in Japan



Fujitsu MB3788 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

DESCRIPTION

FEATURES

PACKAGE

PIN ASSIGNMENT

PIN DESCRIPTION

BLOCK DIAGRAM

FUNCTIONAL DESCRIPTION

■ ABSOLUTE MAXIMUM RATINGS

■ RECOMMENDED OPERATING CONDITIONS

ELECTICAL CHARACTERISTICS

■ STANDARD CHARACTERISTIC CURVES

HOW TO SET OUTPUT VOLTAGE

HOW TO SET OUTPUT CURRENT

PROCESSING WITHOUT USING SCP PIN

APPLICATION CIRCUIT

NOTES ON USE

ORDERING INFORMATION

PACKAGE DIMENSION