NCP694 1A CMOS Low-Dropout Voltage Regulator
The NCP694 series of fixed output super low dropout linear regulators are designed for portable battery powered applications with high output current requirement up to 1 A and −3 mV typical load regulation at 1 A. Each device contains a voltage reference unit, an error amplifier, a PMOS power transistor, resistors for setting output voltage, a current limit circuits for overcurrent and thermal−shutdown. A standby mode with ultra low supply current can be realized with the chip enable function. The device is housed in the SOT−89−5 and HSON−6 packages. Standard voltage versions are 0.8 V, 1.0 V, 1.2 V, 2.5 V, 3.3 V for fixed version and adjustable output voltage down to 1.0 V.
Features http://onsemi.com MARKING DIAGRAMS
1 SOT−89−5 CASE 528AB XXX XMM G 6 6 1 HSON−6 CASE 506AE XXX XYYG 1
• Maximum Operating Voltage of 6.0 V • Minimum Output Voltage Down to 0.8 V for Fix Version and 1.0 V • • • • • • • • •
for Adjustable Version Load Regulation −3 mV at 1 A Output Current Low Dropout Build−in Auto Discharge Function for D Version Standby Mode With Low Consumption These are Pb−Free Devices Battery Powered Instruments Hand−Held Instruments Camcorders and Cameras Portable communication equipments
Typical Applications
XXXX = Specific Device Code MM, YY = Lot Number G or G = Pb−Free Package For actual marking Pb−Free indicator, “G” or microdot “G” may or may not be provided.
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 15 of this data sheet.
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 1
1
Publication Order Number: NCP694/D
NCP694
654 HSON−6 123 (TOP VIEW) 5 4 321 (BOTTOM VIEW) 4 5 456
SOT−89−5
1
2 3 (TOP VIEW)
Figure 1. Pin Description
3 2 1 (BOTTOM VIEW)
PIN FUNCTION DESCRIPTION FOR SOT−89−5 PACKAGE
Pin No. 1 2 3 4 5 Pin Name ADJ/NC GND CE Vin Vout Description Adjust pin for NCP694DADJHT1G and NCP694HADJHT1G / No connection Power supply ground This input is used to place the device into low−power standby. When this input is pulled low, the device is disabled. If this function is not used, Enable should be connected to Vin. Positive power supply input voltage. Regulated output voltage.
PIN FUNCTION DESCRIPTION FOR HSON−6 PACKAGE
Pin No. 1 2 3 4 5 6 Pin Name Vout Vout ADJ / NC GND CE Vin Regulated output voltage Regulated output voltage Adjust pin for NCP694DSANADJT1G and NCP694HSANADJT1G / No connection Power supply ground This input is used to place the device into low power standby. When this input is pulled low, the device is disabled. If this function is not used, Enable should be connected to Vin. Positive power supply input voltage Description
Vin Vin
Vout Vout
Vin Vin
Vout Vout
Vref
Vref
CE
Current Limit& Thermal Shutdown GND
CE
Current Limit & Thermal Shutdown GND
Version H (NCP694HxxxxT1G)
Figure 2. Internal Block Diagram http://onsemi.com
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Version D (NCP694DxxxxT1G)
NCP694
MAXIMUM RATINGS
Rating Input Voltage Enable Voltage Output Voltage Power Dissipation SOT−89−5 Power Dissipation HSON−6 Operating Junction Temperature Operating Ambient Temperature Storage Temperature Symbol Vin VCE Vout PD PD TJ TA Tstg Value 6.5 −0.3 to Vin −0.3 to Vin + 0.3 900 900 +150 −40 to +85 −55 to +125 Unit V V V mW mW °C °C °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per JEDEC Machine Model Method 200 V
THERMAL CHARACTERISTICS
Rating Junction−to−Ambient SOT−89−5 Power Dissipation SOT−89−5 Junction−to−Ambient HSON−6 Power Dissipation HSON−6 NOTE: Symbol RqJA PD RqJA PD 1 oz Copper Thickness, 100 mm2 Test Conditions 1 oz Copper Thickness, 100 mm2 Typical Value 111 900 111 900 Unit °C/W mW °C/W mW
Single component mounted on an 80 x 80 x 1.5 mm FR4 PCB with stated copper head spreading area. Using the following boundary conditions as stated in EIA/JESD 51−1, 2, 3, 7, 12.
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NCP694
ELECTRICAL CHARACTERISTICS FOR FIX VERSION (Vin = Vout(nom.) + 1.0 V, VCE = Vin, Cin = 4.7 mF, Cout = 4.7 mF, TA =
25°C, unless otherwise noted) Characteristic Output Voltage (TA = 25°C, Iout = 100 mA, Vin−Vout = 1 V) 0.8 V 1.0 V 1.2 V 2.5 V 3.3 V Output Current (Vin−Vout = 1 V) Input voltage Line Regulation (Iout = 100 mA) Load Regulation (Iout = 1 mA to 300 mA, Vin = Vout + 2.0 V) Load Regulation (Iout = 1 mA to 1 A, Vin = Vout + 2.0 V) Supply Current (Iout = 0 A, (Vin − Vout) = 1 V, VCE = Vin) Standby Current (VCE = 0V, Vin = 6.0 V) Short Current Limit (Vout = 0 V) Output Voltage Temperature Coefficient Enable Input Threshold Voltage (Voltage Increasing, Output Turns On, Logic High) (Voltage Decreasing, Output Turns Off, Logic Low) Enable Pull−down Current Drop Output Voltage (TA = 25°C, Iout = 300 mA) 0.8 V Output voltage Vout (V) 1.0 V 1.2 V 2.5 V 3.3 V Drop Output Voltage (TA = 25°C, Iout = 1A) 0.8 V Output voltage Vout (V) 1.0 V 1.2 V 2.5 V 3.3 V Ripple Rejection (Ripple 200 mVpp, Iout =100 mA, f = 1 kHz) Output Noise (BW = 10 Hz to 100 kHz, Iout = 1 mA) Thermal Shutdown Temperature/Hysteresis RDS(on) of additional output transistor (D version only) Vin−Vout Symbol Vout Min 0.770 0.970 1.170 2.450 3.234 Typ 0.8 1.0 1.2 2.5 3.3 1 1.4 − −15 − 0.05 −2 −3 60 0.1 250 − 1.0 0 $100 − − 100 0.33 0.22 0.18 0.10 0.05 0.72 0.64 0.56 0.32 0.18 70 30 150/30 30 − 6 0.4 220 0.570 0.470 0.320 0.150 0.100 6.0 0.2 15 − 100 1.0 Max 0.830 1.030 1.030 2.550 3.366 Unit V
Iout Vin Regline Regload03 Regload1 Iss Istby Ish Tc VthCE
A V %/V mV mV mA mA mA ppm/°C V
nA V
Vin−Vout
V
PSRR
Vnoise
dB mVrms °C W
Tshd/Hyst RDS(on)
2. Maximum package power dissipation limits must be observed. 3. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
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NCP694
ELECTRICAL CHARACTERISTIC FOR ADJUSTABLE VERSION (Vin = Vout + 1 V, VCE = Vin, Cin = Cout = 4.7 mF, TA
= 25°C, unless otherwise noted) Characteristic Input Voltage Supply Current (Vout = VADJ, Vin = 2 V, VCE = Vin) Standby Current (Vin = 6.0 V, VCE = 0 V) Reference Voltage For Adjustable Voltage Regulator (Vout = VADJ, Vin = 2.0 V, Iout = 100 mA Output Voltage Range Output Current (Vout = VADJ, Vin = 2.0 V) Load Regulation (Vin = 1.4 V, 1 mA < Iout < 300 mA, Vout = VADJ) Load Regulation (Vin = 1.7 V, 1 mA < Iout < 1 A, Vout = VADJ) Dropout Voltage (Vout = VADJ, Iout = 300 mA) Dropout Voltage (Vout = VADJ, Iout = 1 A) Line regulation (Vout = VADJ, Iout = 100 mA, 1.5 V < Vin < 6.0 V PSRR ( f = 1 kHz, Vout = VADJ, Vin = 2.5 V, Iout = 100 mA, Input Ripple 0.5 Vpp) Output Voltage Temperature Coefficient (Iout = 100 mA, −40°C < TJ < 85°C) Short Current Limit (Vout = VADJ = 0) Enable Pull−down Current Enable Input Threshold Voltage (Voltage Increasing, Output Turns On, Logic High) (Voltage Decreasing, Output Turns Off, Logic Low) Thermal Shutdown Temperature/Hysteresis RDS(on) of additional output transistor (D version only) Symbol Vin ISS Istandby Vref Voutrange Iout Vout/Iout Vout/Iout Vdrop300 Vdrop1 Vout/Vin PSRR Vout/TJ Ilim ICE VthCE 1 0 0.97 1 1 −15 −2 −3 0.18 0.56 0.05 70 $100 250 100 − − 150/ 30 30 220 6 0.4 0.2 0.32 15 Min 1.4 60 0.1 1 Typ Max 6 100 1 1.03 Vin Unit V uA uA V V A mV mV V V %V dB ppm/°C mA nA V
Tshdn/ Hyst RDS(on)
°C W
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NCP694
APPLICATIONS INFORMATION A typical application circuit for the NCP694 series is shown in Figure 5, Typical Application Schematic.
Input Decoupling (C1)
Set external components, especially the output capacitor, as close as possible to the circuit, and make leads as short as possible.
Thermal
A 4.7 mF capacitor either ceramic or tantalum is recommended and should be connected as close as possible to the pins of NCP694 device. Higher values and lower ESR will improve the overall line transient response.
Output Decoupling (C2)
The minimum decoupling value is 4.7 mF and can be augmented to fulfill stringent load transient requirements. The regulator accepts ceramic chip capacitors as well as tantalum devices. If a tantalum capacitor is used, and its ESR is large, the loop oscillation may result. Because of this, select C2 carefully considering its frequency characteristics. Larger values improve noise rejection and load regulation transient response.
Enable Operation
As power across the NCP694 increases, it might become necessary to provide some thermal relief. The maximum power dissipation supported by the device is dependent upon board design and layout. Mounting pad configuration on the PCB, the board material, and also the ambient temperature effect the rate of temperature rise for the part. This is stating that when the NCP694 has good thermal conductivity through the PCB, the junction temperature will be relatively low with high power dissipation applications.
Output Voltage Setting of Adjustable Version.
The enable pin CE will turn on or off the regulator. These limits of threshold are covered in the electrical specification section of this data sheet. If the enable is not used then the pin should be connected to Vin. The D version devices (NCP694DxxxxT1G) have additional circuitry in order to reach the turn−off speed faster than normal type. When the mode is into standby with CE signal, auto discharge transistor turns on.
Hints
An external two resistors are required for setting desired output voltage as shows Figure 3. Output Voltage Setting. The equation for the output voltage is mentioned in equation below.
V out + V ref ) R1 @ I1 + V ref ) R1 @ I adj ) I2 + V ref ) R1 @ V ref R adj ) R1 @ V ref R2 + V ref @ 1 ) R1 R adj ) R1 R2 + 1.0 @ 1 ) R1 R adj ) R1 R2
(eq. 1)
Please be sure the Vin and GND lines are sufficiently wide. If their impedance is high, noise pickup or unstable operation may result.
Vout Radj, RESISTANCE (MW) R1 ADJ Iadj Radj GND R2 I2 I1 Vref = 1 V
For better accuracy, choosing R2
