EC49220
600mA CMOS Ultra LDO Voltage Regulator with EN
DESCRIPTIONS
The EC49220 series of adjustable output ultra low dropout linear regulators are designed for portable battery powered
applications, which require low power consumption and low dropout voltage. Each device contains a band gap voltage
reference, an error amplifier, a PMOS power transistor, and current limit and temperature limit protection circuits.
The output voltage can be adjusted via the external resistor network, based on the internal reference voltage of 0.8V
The EC49220 is designed to work with low cost electrolytic and ceramic capacitors and requires a minimum output capacitor of 1µF.
FEATURE
■ Typical 150mV Dropout Voltage at 500mA.
■ Fast Enable Turn-On Time of 20µs (Typ.)
■ Excellent Line and Load Regulation.
■ High Accuracy Output Voltage of 2%.
■ Ultra-Low Ground Current at 78µA (Typ.)
■ Disable Current Less than 1µA (Typ.)
■ Thermal and Over-Current Protection.
■ Short Circuit Protection
■ Standard SOT23-5 Package.
APPLICATION
■ USB removable devices
■ MPEG4 devices
■ Wireless LAN’s
■ Hand-Held Instrumentation.
■ Portable DVD players
■ Digital camera
ORDERING INFORMATION
EC49220-XX XX X
Output Voltage:
18=1.8V
33=3.3V
AJ=ADJ
R：Tape & Reel
B2:SOT23-5
Part Number | Package | Marking | Marking Information |
EC49220XXB2R | SOT23-5 | 220XXX | 1. Adjustable output voltage X means Production batch. 2. Fixed output voltage 1.0~4.3V X means Production batch. |
PIN CONFIGURATION
Typical Application
Figure 2. ADJ Vout Typical Application Circuit（Minimum Cout 1uF）
Figure 3. Fix Vout Typical Application Circuit（Minimum Cout 1uF）
Pin Description
NO. | Pin Name | Pin Function Description |
1 | ENABLE | Enable Pin |
2 | VIN | Input Voltage |
3 | VOUT | Output Voltage |
4 | ADJ | Adjust Pin |
5 | GND | Ground |
Functional Block Diagram
Absolute Maximum Ratings(1)
Parameter | Symbol | Value | Units |
Input Voltage | VIN | 6.5 | V |
Enable Voltage Range | VEN | -0.3 to VIN | V |
Output Voltage Range | VOUT | -0.3 to VIN | V |
Power Dissipation | PD | SOT23-5：0.4 PSOP8：0.9 | W |
Thermal Resistance, Junction-to-Ambient | ΘJA | SOT23-5: 150 | °C/W |
PSOP8：30 | |||
ΘJC | SOT23-5: 33 | ||
PSOP8：20 | |||
Lead Temperature (Soldering, 5 sec.) |
| 260 | °C |
Junction Temperature Range | TJ | -40 to +150 | °C |
Storage Temperature Range | TS | -60 to +150 | °C |
Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout.MIL-STD-202G 210F
Recommended Operating Conditions(2)
Parameter | Symbol | Value | Units |
Supply Input Voltage Range | VIN | 2~6 | V |
Junction Temperature Range | TJ | -40 to +125 | °C |
Ambient Temperature | TA | -40 to 85 | °C |
Electrical Characteristics
（VIN = （Vout+1.0V）; CIN = 10μF; COUT = 10μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted）
Symbol | Parameter | Conditions | Min | Typ | Max | Unit |
VOUT | Output Voltage Accuracy | Iout=10mA | -2% |
| 2% | V |
VREF | ADJ Pin Voltage | EC49220 – ADJ | -2% | 0.8 | 2% | V |
ΔVOUT/VOUT | Line Regulation | VIN = (VOUT + 0.7)V to 6V | -- | 0.05 | 0.2 | %/V |
ΔVOUT/VOUT | Load Regulation (5) | VIN = (VOUT + 0.7)V IOUT = 10mA to 600mA | -- | 0.12 | 1 | % |
ΔVOUT/ΔT | Output Voltage Temperature Coefficient | Note 4 | -- | 0.1 | -- | mV/°C |
VIN – VOUT | Dropout Voltage (6) | VOUT＜2.5V ,IOUT = 600mA | -- | 306 | 550 | mV |
VOUT≥2.5V ,IOUT = 600mA | -- | 240 | 350 | |||
TPROTECTION | Thermal Protection | Thermal Protect Threshold | -- | 150 | -- | °C |
Hysterisys |
| 30 |
| |||
IQ | Quiescent Current | VEN = VIN; IOUT = 0mA | -- | 78 | 100 | μA |
VEN = 0.4V; IOUT = 0mA | -- | 0.1 | 1 | |||
VTH(EN) | Enable Input Threshold Voltage | Voltage Increasing, Output Turns On, Logic High | 1.6 | -- | -- | V |
Voltage Decreasing, Output Turns Off, Logic Low | -- | -- | 0.4 |
| ||
ILIMIT | Current Limit |
| 1 | 1.7 | -- | A |
Ishort | Short Circuit Current | VIN=Vout+1V; Vout< 0.4V | -- | 0.32 | -- | A |
PSRR | Ripple Rejection | f =1KHz VIN=4.5V Vp-p=0.5V, ILoad=50mA |
| 53.6 |
| dB |
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX)
= (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.See “Thermal Consideration” section for details
Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total
temperature range.
Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing.Parts are tested for load regulation in the load range from 10mA to 600mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2%
below its nominal value measured at 1V differential.Input voltage above minimum Vin=2V.
Typical Performance Characteristics