SCI7661C0A Seiko, SCI7661C0A Datasheet

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SCI7661C0A

Manufacturer Part Number
SCI7661C0A
Description
DC-DC converter, 95% Typical Power Efficiency
Manufacturer
Seiko
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SCI7661C0A
Manufacturer:
EPSON
Quantity:
1 015
The SCI7661C
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.
DESCRIPTION
FEATURES
BLOCK DIAGRAM
High performance with low power dissipation
Simple conversion of V
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 A
Cascade connection–two device connected:
On-chip C'–R oscillator
Package .................................... SCI7661C
2 |V
V
IN
=–5V, V
IN
| (+10V), 2V
OUT
OA
/M
=–20V
OA
IN
CMOS DC-DC Converter features high operational performance with low power dissipation.
CAP1+
CAP2+
CAP1–
CAP2–
(–10V) or 3V
OSC1
OSC2
IN
V
V
DD
IN
(–5V) to |V
SCI7661M
SCI7661M
IN
Oscillator
Converter
Converter
Voltage
Booster
Voltage
CR
(–15V)
IN
(I)
(II)
| (+5V),
0A
0A
AA
: DIP-14pin (plastic)
: SOP5-14pin (plastic)
: SSOP2-16pin (plastic)
SCI7661C
Regurator
95% Typical Power Efficiency
Doubled or Tripled Output Voltage
Internal Voltage Regulator
DC-DC Converter
TC1
TC2
P
RV
V
V
off
reg
out
OA
/M
PF110-10
OA

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SCI7661C0A Summary of contents

Page 1

DESCRIPTION The SCI7661C /M CMOS DC-DC Converter features high operational performance with low power dissipation consists of two major parts: the booster circuitry and the regulator circuitry. The booster generates a doubled output voltage (–2.4 to –12V) ...

Page 2

PIN CONFIGURATION CAP1 CAP1 OSC1 CAP2 OSC2 CAP2 off 10 RV TC1 5 TC2 reg out The same pin configuration in ...

Page 3

Characteristic Symbol Regulated output load V reg fluctuation I OUT Regulated output saturation R SAT resistance V RV0 Reference voltage V RV1 V RV2 0 CT Temperature Gradient Input leakage current I L RECOMMENDED OPERATING CONDITIONS ...

Page 4

PERFORMANCE CURVES 1000 V =- =-3V 100 IN V =-1. 10K 100K 680K1M 10M OSC Fig.1 Oscillation Frequency(f )vs. OSC External-Resistance(R ) OSC 0 Ta= =- ...

Page 5

V = OUT -5V 0. OUT -10V 0.15 0. OUT -15V 0.05 0. (mA) OUT Fig:13 Regulated Output Saturation Resistance(R )V —V —I SAT reg OUT OUT CIRCUIT ...

Page 6

Temperature Gradient Assignment P TC2 TC1 off 1(V ) L OUT OUT ...

Page 7

Positive Voltage Conversion The input voltage can be doubled or tripled toward the positive side. (In the doubler configuration, capacitor C are disconnected and the diode D In this case, however, the output voltage decrease by V voltage) For example ...

Page 8

Plastic SOP5-14pin 8 10.5 max ( 0.413 ) max 10.2 0.2 +0.007 ( ) 0.402 –0.008 14 8 INDEX 1 7 0.4 0.1 1.27 0.1 +0.003 ( ) ( ) 0.05 0.003 0.016 –0.004 SCI7661C / 0.15 0.1 ...

Page 9

... NOTICE No part of this material may be reproduced or duplicated in any form or by any means without the written permission of Seiko Epson. Seiko Epson reserves the right to make changes to this material without notice. Seiko Epson does not assume any liability of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and, further, there is no representation that this material is applicable to products requiring high level reliability, such as, medical products ...

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