Document
S-1112/1122 Series
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HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.1_00
The S-1112/1122 Series is a positive voltage regulator with a low dropout voltage, high-accuracy output voltage, and low current consumption developed based on CMOS technology. A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a built-in overcurrent protection circuit prevents the load current from exceeding the current capacity of the output transistor. An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the conventional CMOS technology, a larger variety of capacitors are available, including small ceramic capacitors. Small SNT-6A(H) (S-1112 Series only) and SOT-23-5 packages realize high-density mounting. In SOT-23-5, the lineup includes the S-1112 and S-1122 Series, which differ in pin configuration.
Features
• Output voltage: • Output voltage accuracy: • Dropout voltage: • Current consumption:
• Output current: • Output capacitor: • Ripple rejection: • Built-in overcurrent protection circuit: • Built-in ON/OFF circuit: • Operation temperature range: • Lead-free, Sn 100%, halogen-free*2
1.5 V to 5.5 V, selectable in 0.1 V step
±1.0% 190 mV typ. (3.0 V output product, IOUT = 100 mA) During operation: 50 μA typ., 90 μA max. During power-off: 0.1 μA typ., 1.0 μA max. Possible to output 150 mA (VIN ≥ VOUT(S) + 1.0 V)*1 A ceramic capacitor of 0.47 μF or more can be used. 80 dB typ. (f = 1.0 kHz)
Limits overcurrent of output transistor.
Ensures long battery life.
Ta = −40°C to +85°C
*1. Attention should be paid to the power dissipation of the package when the output current is large. *2. Refer to “ Product Name Structure” for details.
Applications
• Constant-voltage power supply for battery-powered device • Constant-voltage power supply for personal communication device • Constant-voltage power supply for home electric/electronic appliance • Constant-voltage power supply for cellular phone
Packages
• SNT-6A(H) • SOT-23-5
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1112/1122 Series
Rev.6.1_00
Block Diagram
VIN
*1
VOUT
Overcurrent protection circuit
ON/OFF
ON/OFF circuit
+ −
Reference voltage circuit
VSS *1. Parasitic diode
Figure 1
2 Seiko Instruments Inc.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.1_00
S-1112/1122 Series
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1112/1122 Series. Refer to “1. Product name” regarding the contents of product name, “2. Packages” regarding the package drawings, “3. Product name lists” regarding details of product name.
1. Product name (1) SNT-6A(H) for S-1112 Series
S-1112 x xx PI - xxx TF U
Environmental code U: Lead-free (Sn 100%), halogen-free
IC direction in tape specifications*1 Product name (abbreviation)*2
Package name (abbreviation) PI : SNT-6A(H)
Output voltage 15 to 55 (E.g., when the output voltage is 1.5 V, it is expressed as 15.)
Product type*3 A: ON/OFF pin negative logic B: ON/OFF pin positive logic
(2) SOT-23-5 for S-1112 Series
S-1112 x xx MC - xxx TF x
Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications*1 Product name (abbreviation)*2
Package name (abbreviation) MC: SOT-23-5
Output voltage 15 to 55 (E.g., when the output voltage is 1.5 V, it is expressed as 15.)
Product type*3 A: ON/OFF pin negative logic B: ON/OFF pin positive logic
*1. Refer to the tape drawing. *2. Refer to the product name lists. *3. Refer to “3. ON/OFF pin” in “ Operation”.
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1112/1122 Series
Rev.6.1_00
(3) S-1122 Series
S-1122 x xx MC - xxx TF x
Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications*1 Product name (abbreviation)*2
Package name (abbreviation) MC: SOT-23-5
Output voltage 15 to 55 (E.g., when the output voltage is 1.5 V, it is expressed as 15.)
Product type*3 A: ON/OFF pin negative logic B: ON/OFF pin positive logic
*1. Refer to the tape drawing. *2. Refer to the product name lists. *3. Refer to “3. ON/OFF pin” in “ Operation”.
2. Packages
Package name SNT-6A(H) SOT-23-5
Package PI006-A-P-SD MP005-A-P-SD
Drawing code
Tape
Reel
PI006-A-C-SD
PI006-A-R-SD
MP005-A-C-SD MP005-A-R-SD
Land PI006-A-L-SD
⎯
4 Seiko Instruments Inc.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.6.1_00
S-1112/1122 Series
3. Product name lists
(1) S-1112 Series
Table 1
Output Voltage
SNT-6A(H)
SOT-23-5
1.5 V ±1.0%
S-1112B15PI-L6ATFU S-1112B15MC-L6ATFx
1.6 V ±1.0%
S-1112B16PI-L6BTFU S-1112B16MC-L6BTFx
1.7 V ±1.0%
S-1112B17PI-L6CTFU S-1112B17MC-L6CTFx
1.8 V ±1.0%
S-1112B18PI-L6DTFU S-1112.