Epson SCI7661C0A, SCI7661M0A, SCI7661MAA Datasheet

T

V

DD

V

IN

CAP1–

CAP2–

CAP1+

CAP2+

OSC1
OSC2

CR

Oscillator

Voltage

Converter

(I)

Voltage

Converter

(II)

Reference Voltage

Generator

Voltage Regulator

Temperature Gradient

Select Circuit

TC1

TC2

P

off

V

reg

V

out

RV

Booster Regurator

DC-DC Converter

PF110-10

● 95% Typical Power Efficiency

● Doubled or Tripled Output Voltage

● Internal Voltage Regulator

SCI7661C

OA

/M

OA

■ DESCRIPTION

The SCI7661COA/

MOACMOS DC-DC Converter features high operational performance with low power dissipation.
It consists of two major parts: the booster circuitry and the regulator circuitry. The booster generates a doubled
output voltage (–2.4 to –12V) or tripled output voltage (–3.6 to –18V) from the input (–1.2 to –6V). The regulator is
capable of setting the output to any desired voltage. The regulated voltage can be given one of the three threshold
temperature gradients.

■ FEATURES

● High performance with low power dissipation

● Simple conversion of V

IN

(–5V) to |VIN| (+5V),

2 |VIN| (+10V), 2V

IN

(–10V) or 3V

IN

(–15V)

● On-chip output voltage regulator

● Power conversion efficiency–Typ. 95%

● Temperature gradient for LCD power supply – 0.1% / °C, 0.4%/°C or 0.6%/ °C

● Power off by external signals – Stationary current at power off – Max. 2 µA

● Cascade connection–two device connected:

VIN=–5V, V

OUT

=–20V

● On-chip C'–R oscillator

● Package .................................... SCI7661C0A: DIP-14pin (plastic)

SCI7661M0A: SOP5-14pin (plastic)
SCI7661MAA: SSOP2-16pin (plastic)

■ BLOCK DIAGRAM

Low Voltage

Operation

Products

2

SCI7661C

OA

/M

OA

■ PIN CONFIGURATION ■ PIN DESCRIPTION

■ ELECTRICAL CHARACTERISTICS

■ ABSOLUTE MAXIMUM RATINGS

CAP1+

CAP2+

CAP1-

CAP2­TC1

TC2
V

IN

1

3

2

4
5

6
7

V

DD

P

off

V

reg

V

out

OSC1
OSC2

RV

14

11

9
8

13
12

10

The same pin configuration in
DIP and SOP

CAP1+, CAP1­CAP2+, CAP2­TC1, TC2
V

IN

V

OUT

Vreg
R

V

P

off

OSC2, OSC1
V

DD

1, 2
3, 4
5, 6

7

8

9
10
11

12, 13

14

Pin name No. Function

Terminal for connection of capacitor for doubler
Terminal for connection of capacitor for tripler
Temperature gradient selection terminal
Power supply terminal(negative, system supply

GND)
Output terminal at tripling
Regulated voltage output terminal
Regulated voltage control terminal
Vreg output ON/OFF control terminal
Oscillation resistor connection terminal
Power supply terminal(positive system supply

VCC)

Characteristic Symbol ConditionMin. Typ. Max. Unit

(VDD = 0V, VIN=-5V, Ta=-30 to 85°C)

∆V

reg

∆V

OUT•Vreg

RL=∞, RRV=1MΩ,
V

O

=-18V

R

L

=∞, R

OSC

=1MΩ

R

L

=∞, RRV=1MΩ

V

OUT

=-15V

-18V<V

OUT

<-8V,

V

reg

=-8V, RL=∞, Ta=25°C

TC2=TC1=V

OUT

, RL=∞

R

OSC

=1MΩ

I

OUT

=10mA

V

I

V

O

-6.0

-18.0

-1.2 V
V

V

OUT

Iopr

1

-18.0
60

50

20

150

-3.2
100

V

µA

-18Vreg -2.6 V

Iopr

2

12.0 µA

I

OUT

=5mA95Peff %

0.2 %/V

I

Q

f

osc

R

OUT

16

90

2.0
24

200

µA

kHz

Ω

Input supply voltage

Output voltage

Regulator operating voltage
Booster current consumption
Regulator current

consumption

Booster power conversion
efficiency

Regulated output voltage
fluctuation

Stationary current
Oscillation frequency
Output impedance

V

I

Input terminal voltage

OSC1, P

off

TC1, TC2, RV

Plastic package

Rating Symbol Remark

V
V

Unit

0.5

0.5

Max.

V

IN

-0.5

V

OUT

-0.5

V

O

P

d

T

opr

T

stg

T

sol

Output voltage
Allowable loss
Operating temperature
Storage temperature
Soldering temperature and time

V

mW

°C
°C

-

300

85

150

-20.0

-30

-55

V

I

Input supply voltage V0.5-20/N

Min.

(VDD=0V)

260°C, 10s(at lead)

N=2 : Doubler
N

=

3 : Tripler

Note: When this IC is soldered in the solder-reflow process, be sure to maintain the reflow furnace at the curve shown in "Fig.

1-5 Reflow Furnace Temperature Curve" of this DATA BOOK. And this IC can not be exposed to high temperature of
the solder dipping.

3

SCI7661C

OA

/M

OA

■ RECOMMENDED OPERATING CONDITIONS

(V

IN

=

-

1.2V ~ -2.2V)

=C1=10µF

C

2

=10µF

+

­+

+-

-

1
2

3
4
5
6

7

14
13

12
11
10

9
8

R

OSC

=

1MΩ

R

L

C

L

C

3

=22µ

F

D

1

(

V

F

(

IF=

1mA

)) ≤

0.6v

5

4

3

2

1

0

0 1.5 2 3 4 5 6

V

STA2

V

STA1

V

IN

(

V)

Triple

Double

R

L

Min.

(

k

Ω

)

Characteristic Symbol ConditionMin. Typ. Max. Unit

∆V

reg

∆I

OUT

| V

reg

(50°C) | - | V

reg

(0°C) |

50°C-0°C

CT =

1

| V

reg

(25°C) |

××100

V

OUT

=-15V, V

reg

=-8V,
Ta=25°C
0<I

OUT

<10mA, TC1=V

DD

TC2=V

OUT

R

SAT

=D(Vreg—V

OUT

)/DI

OUT

0<I

OUT

<10mA, RV=VDD,

Ta=25°C
TC2=V

OUT

, TC1=VDD, Ta=25°C

TC2=TC1=V

OUT

, Ta=25∞C

P

off

, TC1, TC2, OSC1, RV pins

Ω5

Ω5R

SAT

V
V
V

-1.5

-1.3

-0.9

-1.0

-1.1

-0.8

-2.3

-1.7

-1.1

V

RV0

V

RV1

V

RV2

%/°C
%/°C
%/°C

-0.1

-0.4

-0.6

-0.06

-0.3

-0.5

-0.25

-0.5

-0.7

CT

0

CT

4

CT

2

µA2.0I

L

Regulated output load
fluctuation

Regulated output saturation
resistance

Reference voltage

Temperature Gradient

Input leakage current

TC2=V

DD

, TC1=V

OUT

, Ta=25°C

Condition Symbol RemarkUnitMax.Min.

(Ta=-30 to 85°C)

R

OSC

=1MΩ, C

3

≥

10µF*

1

CL/C

3

≤

1/20, Ta=-20 to 85°C

R

OSC

=1MΩ

R

OSC

=1MΩ

V

V

V

Ω

mA

kHz

-2.2

2000

-1.2

20
30

-1.2

R

L

Min.*

2

10

V

STA2

V

STA1

V

STP

R

L

I

OUT

f

OSC

Booster start voltage

Booster stop voltage
Output load resistance
Output load current
Oscillation frequency

µF

3.3

C

1

, C2, C

3

kΩ680R

OSC

Capasitor for booster

Extarnal resistance for
oscillation

1000 kΩ100R

RV

Regulated output adjustable
resistance

*1: Recommended circuity in low voltage operation is

shown below.

*2: R

L

Min. depends on input voltage as shown below.