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YB1200SC82S-2.5G中文资料

Description

The YB1200 family consists of a series of

150mA ultra-low-noise, low dropout (LDO)

linear regulators especially designed for

battery-powered RF and wireless applications. The YB1200 regulator achieves a low 250mV dropout at 150mA load current of 3.3V output, ultra-low output voltage noise of 15μVrms and PSRR of 57dB at 1KHz.

The YB1200 regulators are also optimized to work with low-ESR and low cost ceramic capacitors reducing the amount of board space critical in hand-held devices. The

YB1200 requires only 0.47 μF output capacitor for stability with any load. The YB1200 consumes less than 1μA in shutdown mode.

Other features include high output voltage accuracy and current limiting protection. The YB1200 regulators are available in a tiny SC-70 / SC-82 package.

Typical Application Circuit

Features

High Accuracy +-2%

Ultra-Low-Noise Low-Drop-Out

Regulator with 1.8/2.5/2.6/2.8/3.0/3.3V

Preset Outputs

Stable with 0.47μF Ceramic Capacitor for Any Load

Typical Output Current: 150mA Low Quiescent Current: ~90μA

250mV Dropout at 150mA Load (3.3V) Only Need Input and Output Capacitors

Power Saving Shutdown Mode (<1μA) Thermal Protection Shutdown Built-In Internal Soft-Start

Output Short-circuit Current Limit

Protection Green package (RoHS) available

Applications

PDA, Palmtops and Notebook Computers DSC, Handset Camera Modules PCMCIA Cards, PC Cameras

USB Based Portable Devices (MP3, PMP) GSM/GPRS/3G RF Transceiver Modules Wireless LANs, Bluetooth Portable Radios

Figure 1-1. SC-70 application circuit

Pin Name

SC-70 Description

1 IN Unregulated Input Supply.

2 GND Ground pin.

3 EN

Pull high to enable the regulator.

N.C.

Bypass

No external connection needed for normal operation.

Noise Bypass for Ultra-Low-Noise Operation by connecting a 30nF capacitor from

Bypass to GND. 5

OUT

Regulated Output Voltage. Bypass with a capacitor to GND.

Pin Name SC-82 Description

Pull high to enable the regulator.

2 GND Ground pin. 3

OUT

Regulated Output Voltage.

4 IN Unregulated Input Supply.

Pin Configuration

Pin Description

Table 1

SC-70 Figure 2. Pin configuration

Figure 1-2. SC-82 application circuit

Ordering Information

Table 2

YB1200 Order Information

Package Marking Supplied as:

Information

Output Voltage Grade Order

SC70-5 Small Package

1.8 Green Package+ Standard YB1200SC70S-1.8G BA 3000 Units Tape & Reel

2.5 Green Package+ Standard YB1200SC70S-2.5G BB 3000 Units Tape & Reel

2.6 Green Package+ Standard YB1200SC70S-2.6G BE 3000 Units Tape & Reel

2.8 Green Package+ Standard YB1200SC70S-2.8G BC 3000 Units Tape & Reel

3.0 Green Package+ Standard YB1200SC70S-3.0G BF 3000 Units Tape & Reel

3.3 Green Package+ Standard YB1200SC70S-3.3G BD 3000 Units Tape & Reel

SC-82 Small Package

1.8 Green Package+ Standard YB1200SC82S-1.8G DA 3000 Units Tape & Reel

2.5 Green Package+ Standard YB1200SC82S-2.5G DB 3000 Units Tape & Reel

2.6 Green Package+ Standard YB1200SC82S-2.6G DE 3000 Units Tape & Reel

2.8 Green Package+ Standard YB1200SC82S-2.8G DC 3000 Units Tape & Reel

3.0 Green Package+ Standard YB1200SC82S-3.0G DF 3000 Units Tape & Reel

3.3 Green Package+ Standard YB1200SC82S-3.3G DD 3000 Units Tape & Reel

Function Parameter Conditions Min Typ Max Units

Input Voltage Range 2.0 6.0 V Output Voltage Predefined (metal masks) 1.8 3.3 V Output Voltage Accuracy I OUT = 10mA -2.0 +2.0 % Output Current Limit Short-circuit output 200 mA

V OUT = 3.3V, I OUT = 150mA 250 V OUT = 3.0V, I OUT = 150mA 275 V OUT = 2.8V, I OUT = 150mA 300 V OUT = 2.6V, I OUT = 150mA

310 V OUT = 2.5V, I OUT = 150mA

320 Dropout Voltage (See Note 1)

V OUT = 1.8V, I OUT = 150mA

500 mV Ground Current I OUT = 0 mA 90 μA Line Regulation V IN = (V OUT + 1V) to 6.0V, I OUT = 10 mA 0.3 %/V Load Regulation I OUT = 1mA to 150mA 1.2 % Shutdown Supply Current EN=0V

~0.01

μA Absolute Maximum Ratings

Supply Voltage........................................-0.3V to 7.0V Output Voltage...............................-0.3V to (V IN +0.3V) Output Short-Circuit Duration...........................Infinite Junction Temperature Range...........................+150℃ Storage Temperature Range .............-65℃ to +150℃

Lead Temperature............................................+250℃ Thermal Resistance (SC-70/82, θJA)............330℃/W Internal Power Disspation (SC-70/82, PD)……...0.3W Electrical Characteristics Table 3

Recommended Operating Conditions

Input Supply Voltage................................2V to 6.0V Operating Temperature.....................-40℃ to +85℃

ESD Susceptibility (HBM)...........................................2KV ESD Susceptibility (MM)...........................................200V

T A = 25℃ , V IN = ( V OUT + 1V ), C IN = C OUT = 0.47μF, V EN = V IN

f = 100Hz, I OUT =1mA 52

f = 1KHz, I OUT =1mA 55 Ripple Rejection (PSRR)

f = 10KHz, I OUT =

1mA 53 dB f = 100Hz to 100KHz, Iload=10mA, Bypass=0nF 45 μVrms Output Noise Voltage f = 100Hz to 100KHz,

Iload=10mA, Bypass=30nF

15 μVrms Shutdown Exit Delay (See Note 2)

Rload =

50ohm 45 300 μs EN Logic Low Level

V IN =2.0V to 5.5V 0.4 V EN Logic High Level

V IN =2.0V to 5.5V 1.2 VIN V EN Input Bias Current V IN =5.5V, EN=0V or 6V 0.01 μA Thermal Shutdown

Shutdown Temperature 160 ℃ Thermal-Shutdown ysteresis

℃

Note1 : The drop out voltage varies depending on output voltage selection

Dropout

is defined as V IN – V OUT when V OUT is 100mV below V OUT where Vin=Vout +1V for nominal V OUT . Note 2: Time needed for V OUT to reach 90% of final value.

Typical Characteristics

At T A = 25℃, V IN = ( V OUT + 1V), C IN = C OUT = 0.47μF, V EN = V IN , unless otherwise noted.

I LOAD =1mA

Shutdown Exit Delay

Line Transient Response

Shutdown Delay

Load Transient Response

Shutdown V oltage

3.34V

C IN = 0.47μF C OUT = 0.47μF I Load = 100μA

C IN = 0.47μF C OUT = 0.47μF V IN = 3.34V

100mA 100μA

V o=2.84V R Load =50Ω V o

R Load =50Ω

Shutdown V oltage

GND

Figure 3. Block Diagram Functional Block Diagram

Functional Description

The YB1200 is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. It is supplied in a SC-70 and SC-82 package for space and noise sensitive applications. These devices can supply loads up to 150mA. As shown in the Functional Block Diagram, the YB1200 consists of a reference and noise bypass circuit, error amplifier, output drive transistor, internal feedback voltage divider, thermal sensor, and short circuit current limiter. The internal reference is connected

to the error amplifier’s inverting input. The error amplifier compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled low. This allows more current to pass to the output and increases the output voltage. If the feedback voltage is too high, the pass transistor gate is pulled high, allowing less current to pass to the output. The parts are available with preset output voltages ranging from 1.8V to 3.3V.

Stability

The YB1200 is a high performance LDO emphasizing stability with low output capacitance. It is able to maintain stability with an output capacitor as low as 0.47uF. The output capacitor can also be increased to optimize performance. The YB1200 will remain stable and in regulation with no load, unlike many other voltage regulators.

Internal P-Channel Pass Transistor

The YB1200 features a low impedance P-channel MOSFET pass transistor. This provides several advantages over similar designs using a PNP pass transistor, including low operating power and longer

battery life. The YB1200 consumes only 90μA of quiescent current under most conditions.

Output Short-Circuit Current Limit

The YB1200 includes a current limiter, which monitors and controls the pass transistor’s gate voltage, limiting the output current to about 200 mA, for example, in a short-circuit output situation.

Shutdown

The YB1200 also features a low-power active shutdown mode. It has a switch that turns off the device when disabled. This allows the output capacitor and load to discharge and de-energize the load. In the shutdown mode, the internal functional blocks, such as voltage reference and the error amplifier, are turned off completely, and the quiescent current is less than 1μA.

Thermal Protection Shutdown

The thermal protection shutdown function protects the device from operating in over temperature condition. When the junction temperature exceeds +160°C, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool down. The thermal sensor turns the pass transistor on again after the IC’s junction temperature drops to +140°C.

Soft-Start Circuitry

The YB1200 includes a soft-start circuitry to limit inrush current at turn-on. During power up, the output capacitor and output load are charged with a reduced output current. Shortly after the initial power up, the soft-start feature is terminated and normal operation is resumed.

Application Information

Enable/Shutdown

The YB1200 comes with an active-high enable pin that allows the regulator to be enabled. Forcing the enable pin low disables the regulator and puts it into the shutdown mode. This pin cannot be left floating as it may cause an undetermined state.

Input/Output Capacitor

It is recommended to use a 0.47μF capacitor on the YB1200 input and a 0.47μF capacitor on the output. For high regulation performance, larger input capacitor values and lower ESRs provide better noise rejection and line-transient response. The output noise, load-transient response, stability, and power-supply rejection can be improved by using large output capacitors. Low ESR ceramic capacitors provide optimal performance and save space.

Power Supply Rejection and Transient Response

The PSRR and transient response can be improved by increasing the values of the input and output bypass capacitors, and through passive filtering techniques.

SC-70 Package Information

Millimeters Inches Symbol

MIN. MAX. MIN. MAX.

A 0.90 1.10 .036 0.44

A1 0.025 0.10 .001 .004

A2 0.875 1.00 .035 .040

b 0.20 0.40 .008 .016

C 0.10 0.15 .004 .006

D 1.90 2.10 .076 .084

E 1.15 1.35 .046 .054

E1 2.00 2.20 .080 .088

e 0.65 BSC. .026 BSC.

e1 1.30 BSC. .052 BSC.

L 0.425 REF. .017 REF.

Note:

1. All dimensions are in millimeters, and the dimensions in inches are for reference only.

2. 1mm=40mils=0.04inches

SC-82 Package Information

NOTE:

1. CONTROLUNG DIMENSION: mm

2. LEAD FRAME MATERIAL:EFTEC-64T 1/2H OR H.

3. DIMENSION D DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS, MOLD

FLASH/PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.15 mm PER SIDE,

4. DIMENSION E1 DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD

FLASH OR PROTRUSION SHALL NOT EXCEED 0.15mm PER SIDE.