Contributes to downsizing of equipment and reduction of power consumption
Toshiba Electronic Devices & Storage Corporation (“Toshiba”) start mass production of TCR3LM Series, low-current LDO regulators, packaged in DFN4D at Toshiba Semiconductor Thailand.
Demand for IoT communication modules and wearable devices and any mobiles is increasing. While batteries are getting smaller with the demand for initialization, longer battery life is required. In order to achieve long-term operation of the equipment, it is necessary to keep the power consumption of the equipment itself low. One of important things is to keep the current consumption low when devices are in the standby state. The battery will be in standby mode except during operations such as data transfer, but this standby mode will occupy most of the day.
In other words, by keeping the current consumption in this standby state low, it is possible to keep the current consumption of the device itself low, and as a result, it is possible to realize long-time operation even with a small battery capacity.
The new TCR3LM series-a LDO regulator with low current consumption-contributes to reduce the power consumption of equipment. Drop-out performance is improved compared to our another low current LDO TCR2LN series-type [Note 1]. TCR3LM series also offers improved load transient response. This enables more stable output against load fluctuations. In addition, we offer an extensive lineup of output voltage products. Since the max. output current is 300 mA, you can select the best device including our existing-product TCR2LN series. It can be used for a wide range of applications.
TCR3LM series are in surface-mount-type compact, low-profile DFN4D packaging. In addition, small ceramic types can be used for input and output capacitors, making them suitable for power supply lines for mobile devices, wearable devices, and other small devices that require high-density mounting.
[Note 1] Output-current 200 mA
Features
- Low Current Consumption (Low Bias Current): IB(ON)=2.2 μA (max) (IOUT=0 mA, Vin=5.5 V)
- Low dropout voltage: VDO=344 mV (typ.) (VOUT=1.8 V, IOUT=200 mA)
- Load Transient Response Characteristics: -70/+35 mV (typ.) (VOUT=2.8 V, IOUT=1 mA⇔100 mA)
1. Low Current Consumption (Low Bias Current): IB(ON)=2.2 μA (max) (IOUT=0 mA, Vin=5.5 V)
Bias current is the current that flows through the input of the LDO regulator when no output current flows, and the current is required to operate LDO regulator itselves. LDO regulator is used as a power supply for various functional blocks, such as various sensing and data communications. These functions are not always in operation, and some of them may not be in standby mode. In the standby mode, almost no current is supplied to LDO regulator output. Therefore, by making the operating times of the functions as short as possible, measures are taken to keep the average-consumption current (power) of the entire device low. In this case, only the bias current flows from the battery. This characteristic is important to reduce the current consumption. TCR3LM Series suppresses the biasing current to 2.2 μA (max), contributing to power saving and long-time driving of the entire equipment.
2. Low dropout voltage: VDO=344 mV (typ.) (VOUT=1.8 V, IOUT=200 mA)
TCR3LM Series has improved the dropout voltage compared to the conventional product while reducing the biasing current. Generally, decreasing the bias current will degrade the regulator performance. The TCR3LM series has succeeded in both reducing bias current and improving dropout voltage by reviewing the circuit configuration. Since the desired output voltage can be obtained at a lower input voltage than the conventional product, the power consumption can be reduced due to the voltage difference.
3. Load Transient Response Characteristics: -70/+35 mV (typ.) (VOUT=2.8 V, IOUT=1 mA⇔100 mA)
TCR3LM Series has improved the load-transient response-characteristics compared to the conventional product while reducing the biasing current. Generally, decreasing the bias current will degrade the regulator performance. A load transient response indicates the magnitude of output voltage fluctuation that occurs when the output current suddenly increases or decreases. There is a trade-off between reducing the biasing current and deteriorating this performance, but TCR3LM Series has succeeded in improving both by reviewing the circuitry.
Applications
- Mobile devices
- Wearable terminal
- IoT Communication Modules
Main Specifications
(Unless otherwise specified, Ta=25 °C)
| Product Number | TCR2LN series[Note 2] | TCR3LM series | |||
|---|---|---|---|---|---|
| Package | Name | SDFN4 | DFN4D | ||
| Size (mm) | Typ. | 0.8×0.8, t=0.38 | 1.0×1.0, t=0.37 | ||
| Operating range (Ta=-40 to 85 °C) |
Input-voltage VIN (V) | 1.5 to 5.5 | 1.4 to 5.5 | ||
| Output-Voltage VOUT (V) | 0.8 to 3.6 | 0.8 to 5.0 | |||
| Output-current IOUT (mA) | 200 | 300 | |||
| Electrical characteristics (Unless otherwise specified, Tj=-40 to 85 °C) |
Biased current IB(ON) (μA) | Max | 2.0 (IOUT=0 mA, VIN=2.5 V [Note 3]) |
2.2 (IOUT=0 mA, VIN=5.5 V [Note 3]) |
|
| Dropout Voltage VDO (mV) | Max | 600 (IOUT=150 mA, VOUT=1.8 V) |
445 (IOUT=200 mA, VOUT=1.8 V) |
||
| Load-transient response⊿ VOUT (mV) |
Tj=25 °C | Typ. | -400/+400 (1⇔10 mA) |
-70/+35 (1⇔100 mA) |
|
| Control terminal Threshold voltage VCTH (V) |
Control terminal input-voltage "HIGH" |
Min | - | 0.9 | |
| Control terminal Threshold voltage VCTL (V) |
Control terminal input-voltage "LOW" |
Max | - | 0.4 | |
| Control-Voltage (ON) VCT (ON) | Min | 1.0 | - | ||
| Control-voltage (OFF) VCT (OFF) | Max | 0.4 | - | ||
| Overcurrent protection function | Yes | ||||
| Overheat protection function | Yes | ||||
| Auto discharge function | Yes | ||||
| Sample Check & Availability |  |
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[Note 2] Existing products
[Note 3] Control pull-down current (ICT) is not included.
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