Rev.1.0
_00
HIGH RIPPLE-REJECTION LOW DROPOUT
SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
S-1137 Series
S-1137 Series, developed using the CMOS technology, is a positive voltage
regulator IC which has the low dropout voltage, the high-accuracy output
voltage and the soft-start function (300 mA output current).
A 1.0
µF
small ceramic capacitor can be used. It operates with low current
consumption of 45
µA
typ.
The overcurrent protection circuit prevents the load current from exceeding
the capacitance of output transistor. The power-off circuit ensures longer
battery life.
Compared to the conventional CMOS technology regulator ICs, various
capacitors including small ceramic capacitors can be used for this IC.
Furthermore a small SOT-89-5, SOT-23-5, and SNT-6A(H) packages realize
high-density mounting.
Features
•
Output voltage:
•
Low equivalent series resistance capacitor :
•
Wide input voltage range:
•
High-accuracy output voltage:
•
Low dropout voltage:
•
Low current consumption:
•
Output current:
•
Soft-start circuit with external capacitor:
•
High ripple rejection:
•
Built-in overcurrent protection circuit:
•
Built-in power-off circuit:
•
Discharge shunt circuit can be selected.
•
Pull-down register is selectable
•
Small package:
•
Lead-free product
1.2 V to 3.5 V, selectable in 0.05 V step.
Ceramic capacitor of 1.0
µF
or more can be used as the I/O capacitor.
1.7 V to 5.5 V
±1.0%
(1.2 V to 1.45 V output product :
±15
mV)
210 mV typ. (products having the output of 2.8 V, I
OUT
= 300 mA)
During operation:
45
µA
typ., 65
µA
max.
During power-off:
0.1
µA
typ., 1.0
µA
max.
Possible to output 300 mA (at V
IN
≥
V
OUT(S)
+
1.0 V)
*1
Soft-start time : 0.7 ms (C
SS
= 1.0 nF)
70 dB typ. (at 1.0 kHz)
limits overcurrent of output transistor
Ensures long battery life.
SOT-89-5, SOT-23-5, SNT-6A(H)
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
Applications
•
Power supply for battery-powered devices
•
Power supply for cellular phones, portable devices
•
Power supply for digital still cameras, TVs, DVD recorders
Packages
Package Name
SOT-89-5
SOT-23-5
SNT-6A(H)
Drawing Code
Package
UP005-A
MP005-A
PI006-A
Tape
UP005-A
MP005-A
PI006-A
Reel
UP005-A
MP005-A
PI006-A
Land
PI006-A
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
Rev.1.0
_00
S-1137 Series
Block Diagrams
1.
S-1137 Series A type
*1
VIN
Overcurrent
protection circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active “H”
Available
Available
ON / OFF
SSC
Power-off
circuit
Soft start
circuit
Reference
voltage circuit
+
−
*1
*1
VSS
*1.
Parasitic diode
Figure 1
2.
S-1137 Series B type
*1
VIN
Overcurrent
protection circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active “H”
Available
None
ON / OFF
SSC
Power-off
circuit
Soft start
circuit
Reference
voltage circuit
+
−
*1
*1
VSS
*1.
Parasitic diode
Figure 2
2
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
Rev.1.0
_00
S-1137 Series
3.
S-1137 Series C type
*1
VIN
Overcurrent
protection circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active “H”
None
Available
ON / OFF
SSC
Power-off
circuit
Soft start
circuit
Reference
voltage circuit
+
−
*1
VSS
*1.
Parasitic diode
Figure 3
4.
S-1137 Series D type
*1
VIN
Overcurrent
protection circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Pull-down resistor
Status
Active “H”
None
None
ON / OFF
SSC
Power-off
circuit
Soft start
circuit
Reference
voltage circuit
+
−
*1
VSS
*1.
Parasitic diode
Figure 4
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
Rev.1.0
_00
S-1137 Series
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1137 Series. Refer to “1.
Product
name”
regarding the contents of product name, “2.
Function list of product type”
regarding the product type.
1.
Product name
(1)
SOT-89-5, SNT-6A(H)
S-1137
x
xx
−
xxxx
G
Package abbreviation and IC packing specifications
U5T1: SOT-89-5, Tape
I6T2: SNT-6A(H), Tape
Output voltage
*2
12 to 35
(e.g., when the output voltage is 1.2 V, it is
expressed as 12.)
Product type
*3
A to D
*1.
*2.
*3.
(2)
Refer to the tape specifications.
If you request the product which has 0.05 V step, contact our sales office.
Refer to “2.
Function list of product type”.
SOT-23-5
S-1137
x
xx
−
M5T1
S
Package abbreviation and IC packing specifications
*1
M5T1: SOT-23-5, Tape
Output voltage
*2
12 to 35
(e.g., when the output voltage is 1.2 V, it is
expressed as 12.)
Product type
*3
A to D
*1.
*2.
*3.
Refer to the tape specifications.
If you request the product which has 0.05 V step, contact our sales office.
Refer to “2.
Function list of product type”.
*1
4
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
Rev.1.0
_00
S-1137 Series
2.
Function list of product type
Table 1
Product Type
A
B
C
D
ON / OFF Logic
Active “H”
Active “H”
Active “H”
Active “H”
Discharge Shunt Function
Available
Available
None
None
Pull-down Resistor
Available
None
Available
None
Seiko Instruments Inc.
5
MicroPython开源版块
