Sanyo LA5677M Specifications

Ordering number : EN3660B

O3098HA (OT)/92793TS A8-8023 No. 3660-1/7

LA5677M

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Dual Switching Regulator Control IC

Monolithic Linear IC

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

Overview

The LA5677M supports single-input control of the outputs of two converters of arbitrary types, including step up, step down and inverting. Since the LA5677M supports low voltage (3.6 to 18 V) and high frequency (1 to 500 kHz) operation, it is ideal for use in power supplies in battery powered portable equipment.

Features

• Operates at low voltages (3.6 to 18 V)

• Can be used with high frequency oscillators (1 to 500 kHz)

• Built-in low input malfunction prevention circuit

• Built-in timer-latch short circuit protection circuit

Package Dimensions

unit: mm

3035A-MFP16

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

max 20 V

Error amplifier input voltage V

20 V

Collector output voltage V

20 V

Collector output current I

21 mA Allowable power dissipation Pd max 330 mW Operating temperature Topr –20 to +85 °C Storage temperature Tstg –40 to +125 °C

Parameter Symbol Conditions

Ratings

Unit

min typ max

Recommended supply voltage V

3.6 18 V

Error amplifier input voltage V

1.05 1.45 V

Collector output voltage V

–0.3 +18 V

Collector output current I

20 mA

Feedback pin current I

45 µA

Feedback resistance R

100 kΩ

Timing capacitance C

150 15000 pF

Timing resistance R

5.1 100 kΩ

Oscillator frequency f

OSC

1 500 kHz

SANYO: MFP16

[LA5677M]

Operating Conditions at Ta = 25°C

No. 3660-2/7

LA5677M

Parameter Symbol Conditions

Ratings

Unit

min typ max

Output voltage Vref I

= 1 mA 2.40 2.50 2.60 V

Line regulation V

line

VCC= 3.6 to 18 V 2 10 mV

Load regulation V

loadIOR

= 0.1 to 1 mA 1 7.5 mV

Reference voltage

Output voltage

block

temperature ±0.2 % variation

Short circuit output

OSC

Vref = 0 V 3 10 30 mA

current High level threshold

IOR= 0.1 mA 2.70 V

voltage

Low input malfunction Low level threshold

IOR= 0.1 mA 2.58 V

prevention block voltage

Hysteresis Vhys I

= 0.1 mA 80 120 mV

Reset voltage Vr I

= 0.1 mA 1.5 1.9 V

Input threshold

Vtpc 1.02 1.16 1.30 V

voltage Input standby

Vstby No pull-up 0.78 V

Protection circuit

voltage

block Input latch voltage V

No pull-up 0.74 V Input source current Ibpc When VS.C.P is 1.0 V 12 18 27 µA Comparator

Vtc Pins 5, 12 1.2 V

threshold voltage Oscillator frequency fosc Ct = 330 pF, Rt = 10 kΩ 200 kHz fosc standard

∆f

All values agree 10 %

deviation

Oscillator block Frequency variation

∆f

VCC= 3.6 to 18 V 1 %

1 (V

)

Frequency variation

∆ft ±0.4 %

2 (Ta) Input bias current Ibdt 1 µA Latch mode source

Idt 230 µA

current

Idle period

Latch input voltage Vdt Iodt = 40 µA 2.3 V

adjustment circuit

Vt0 With a duty cycle of 0% 2.05 2.25 V

block

Input threshold voltage

Vt100

fosc = 10 kHz,

1.20 1.45 V

With a duty cycle of 100%

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Pin Functions

No. 3660-3/7

LA5677M

Parameter Symbol Conditions

Ratings

Unit

min typ max

Input offset voltage V

With V (pins 5, 12) = 1.25 V –6 +6 mV Input offset current I

With V (pins 5, 12) = 1.25 V –100 +100 nA Input bias current I

With V (pins 5, 12) = 1.25 V 160 500 nA Common mode

ICR

VCC= 3.6 to 18 V 1.05 1.45 V

input voltage range Open loop gain A

RNF= 200 kΩ 80 dB Unity gain

1.5 MHz

bandwidth

Error amplifier block

Common mode

CMRR 80 dB

rejection ratio Maximum output

+ m Vref – 0.1 V

voltage amplitude (1) Maximum output

VO– m 1.0 V

voltage amplitude (2) Output sink current

IO+ m

VID= –0.1 V, VO= 1.25 V 1.6 mA

(pins 5, 12) Output source

IO– m

VID= 0.1 V, VO= 1.25 V –70 µA

current (pins 5, 12) Output leakage

leak

VO= 18 V 10 µA

current

Output block

Output saturation

Vsat IO= 10 mA 1.0 2 V

voltage Short circuit output

VO= 6 V 60 mA

current

Vt0 With a duty cycle of 0% 2.05 2.25 V

Input threshold voltage

Vt100

fosc = 10 kHz,

1.20 1.45 V

PWM comparator

With a duty cycle of 100%

block

Input sink current

With V (pins 5, 12) = 1.25 V 1.6 mA

(pins 5, 12) Input source current

With V (pins 5, 12) = 1.25 V –70 µA

(pins 5, 12) Standby current I

1 Output off state 1.6 2.2 mA

Whole device Average supply

2 RT= 10 kΩ 1.9 2.6 mA

current

No. Pin Function No. Pin Function

1 C

Triangle wave oscillator capacitor connection 9 V

Power supply input

2 R

Triangle wave oscillator resistor connection 10 OUT2 Output 2 3 OP1+ Error amplifier 1 + input 11 DEAD TIME2 Dead time 2 control 4 OP1– Error amplifier 1 – input 12 OP2

OUT

Error amplifier 2 output

5 OP1

OUT

Error amplifier 1 output 13 OP2– Error amplifier 2 – input 6 DEAD TIME1 Dead time 1 control 14 OP2+ Error amplifier 2 + input 7 OUT1 Output 1 15 S. C. P Short circuit protection circuit connection 8 GND Ground connection 16 Vref Reference voltage (2.5 V)

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