PDF《TC1301A/B》

?

2005 Microchip Technology Inc.

DS21798B-page

1 TC1301A/B Features ? Dual Output LDO with Microcontroller Reset Monitor Functionality: - VOUT1 = 1.5V to 3.3V @

300 mA - VOUT2 = 1.5V to 3.3V @

150 mA - VRESET = 2.20V to 3.20V ? Output Voltage and RESET Threshold Voltage Options Available (See Table 8-1) ? Low Dropout Voltage: - VOUT1 =

104 mV @

300 mA, Typical - VOUT2 =

150 mV @

150 mA, Typical ? Low Supply Current:

116 ?A, Typical TC1301A/B with both output voltages available ? Reference Bypass Input for Low-Noise Operation ? Both Output Voltages Stable with a Minimum of

1 ?F Ceramic Output Capacitor ? Separate Input for RESET Detect Voltage (TC1301A) ? Separate VOUT1 and VOUT2 SHDN pins (TC1301B) ? RESET Output Duration:

300 ms. Typical ? Power-Saving Shutdown Mode of Operation ? Wake-up from SHDN: 5.3 ?s. Typical ? Small 8-pin DFN and MSOP Package Options ? Operating Junction Temperature Range: - -40°C to +125°C ? Overtemperature and Overcurrent Protection Applications ? Cellular/GSM/PHS Phones ? Battery-Operated Systems ? Hand-Held Medical Instruments ? Portable Computers/PDAs ? Linear Post-Regulators for SMPS ? Pagers Related Literature ? AN765, Using Microchip'

s Micropower LDOs , DS00765, Microchip Technology Inc.,

2002 ? AN766, Pin-Compatible CMOS Upgrades to BiPolar LDOs , DS00766, Microchip Technology Inc.,

2002 ? AN792, A Method to Determine How Much Power a SOT23 Can Dissipate in an Application , DS00792, Microchip Technology Inc.,

2001 Description The TC1301A/B combines two Low Dropout (LDO) regulators and a microcontroller RESET function into a single 8-pin MSOP or DFN package. Both regulator outputs feature low dropout voltage,

104 mV @

300 mA for VOUT1,

150 mV @

150 mA for VOUT2, low quiescent current consumption,

58 ?A each and a typical regulation accuracy of 0.5%. Several fixed- output voltage and detector voltage combinations are available. A reference bypass pin is available to further reduce output noise and improve the power supply rejection ratio of both LDOs. The TC1301A/B is stable over all line and load conditions with a minimum of

1 ?F of ceramic output capacitance, and utilizes a unique compensation scheme to provide fast dynamic response to sudden line voltage and load current changes. For the TC1301A, the microcontroller RESET function operates independently of both VOUT1 and VOUT2. The input to the RESET function is connected to the VDET pin.The SHDN2 pin is used to control the output of VOUT2 only. VOUT1 will power-up and down with VIN. In the case of the TC1301B, the detect voltage input of the RESET function is connected internally to VOUT1. Both VOUT1 and VOUT2 have independent shutdown capability. Additional features include an overcurrent limit and overtemperature protection that, when combined, provide a robust design for all load fault conditions. Package Types 8-Pin DFN/MSOP RESET SHDN2 Bypass GND VDET

1 2

3 4

5 6

7 8 VOUT2 VIN

1 2

3 4

5 6

7 8 VOUT1 TC1301A RESET SHDN2 Bypass GND VDET VOUT2 VIN VOUT1 DFN8 MSOP8 RESET SHDN2 Bypass GND SHDN1

1 2

3 4

5 6

7 8 VOUT2 VIN

1 2

3 4

5 6

7 8 VOUT1 TC1301B RESET SHDN2 Bypass GND SHDN1 VOUT2 VIN VOUT1 DFN8 MSOP8 Dual LDO with Microcontroller RESET Function TC1301A/B DS21798B-page

2 ?

2005 Microchip Technology Inc. Functional Block Diagrams Typical Application Circuits LDO #2

150 mA LDO #1

300 mA LDO #2

150 mA VIN VOUT1 VOUT2 Bandgap Reference 1.2V SHDN2 Threshold Detector Time Delay

300 ms, typ RESET VDET GND Bypass TC1301A VDET TC1301B VIN SHDN2 GND Bypass SHDN1 LDO #1

300 mA Threshold Detector Time Delay

300 ms typ VOUT1 VOUT2 RESET V OUT1 Bandgap Reference 1.2V VOUT1

8 4

1 2

3 RESET GND VDET BATTERY COUT1

1 ?F Ceramic X5R CIN

1 ?F TC1301A COUT2

1 ?F Ceramic X5R CBYPASS (Note)

10 nF Ceramic Bypass VIN

7 VOUT2

6 SHDN2 ON/OFF Control VOUT2 System RESET 2.8V @

300 mA 2.6V @

150 mA

5 VOUT1

8 4

1 2

3 RESET GND SHDN1 BATTERY COUT1

1 ?F Ceramic X5R CIN

1 ?F TC1301B

1 ?F Ceramic X5R Bypass VIN

7 2.7V to 4.2V VOUT2

6 SHDN2 ON/OFF Control VOUT2 System RESET 2.8V @

300 mA 2.6V @

150 mA

5 ON/OFF Control VOUT1 Note: CBYPASS is optional 2.7V to 4.2V COUT2 ?

2005 Microchip Technology Inc. DS21798B-page

3 TC1301A/B 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings ? VDD.6.5V Maximum Voltage on Any Pin ...... (VSS C 0.3) to (VIN + 0.3)V Power Dissipation Internally Limited (Note 7) Storage temperature 65°C to +150°C Maximum Junction Temperature, TJ 150°C Continuous Operating Temperature Range ..-40°C to +125°C ESD protection on all pins, HBM, MM.4 kV, 400V ? Notice: Stresses above those listed under Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. DC CHARACTERISTICS Electrical Specifications: Unless otherwise noted, VIN = VR +1V, IOUT1 = IOUT2 =

100 ?A, CIN = 4.7 ?F, COUT1 = COUT2 =

1 ?F, CBYPASS =

10 nF, SHDN >

VIH, TA = +25°C. Boldface type specifications apply for junction temperatures of -40°C to +125°C. Parameters Sym Min Typ Max Units Conditions Input Operating Voltage VIN 2.7 ― 6.0 V Note

1 Maximum Output Current IOUT1Max

300 ― ― mA VIN = 2.7V to 6.0V (Note 1) Maximum Output Current IOUT2Max

150 ― ― mA VIN = 2.7V to 6.0V (Note 1) Output Voltage Tolerance (VOUT1 and VOUT2) VOUT VR C 2.5 VR±0.5 VR + 2.5 % Note

2 Temperature Coefficient (VOUT1 and VOUT2) TCVOUT ―

25 ― ppm/°C Note

3 Line Regulation (VOUT1 and VOUT2) ΔVOUT/ ΔVIN ― 0.02 0.2 %/V (VR+1V) ≤ VIN ≤ 6V Load Regulation, VOUT ≥ 2.5V (VOUT1 and VOUT2) ΔVOUT/ VOUT -1 0.1 +1 % IOUTX = 0.1 mA to IOUTMax (Note 4) Load Regulation, VOUT <

2.5V (VOUT1 and VOUT2) ΔVOUT/ VOUT -1.5 0.1 +1.5 % IOUTX = 0.1 mA to IOUTMax (Note 4) Thermal Regulation ΔVOUT/ΔPD ― 0.04 ― %/W Note

5 Dropout Voltage (Note 6) VOUT1 ≥ 2.7V VIN C VOUT ―

104 180 mV IOUT1 =

300 mA VOUT2 ≥ 2.6V VIN C VOUT ―

150 250 mV IOUT2 =

150 mA Supply Current TC1301A IIN(A) ―

103 180 ?A SHDN2 = VIN, VDET = OPEN, IOUT1 = IOUT2 =

0 mA TC1301B IIN(B) ―

114 180 ?A SHDN1 = SHDN2 = VIN, IOUT1 = IOUT2 =

0 mA Note 1: The minimum VIN has to meet two conditions: VIN ≥ 2.7V and VIN ≥ VR + VDROPOUT. 2: VR is defined as the higher of the two regulator nominal output voltages (VOUT1 or VOUT2). 3: TCVOUT = ((VOUTmax - VOUTmin) *

106 )/(VOUT * ΔT). 4: Regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from 0.1 mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 5: Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to ILMAX at VIN = 6V for t =

10 ms. 6: Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its value measured at a 1V differential. 7: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction-to-air (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate thermal shutdown. TC1301A/B DS21798B-page

4 ?

2005 Microchip Technology Inc. Shutdown Supply Current TC1301A IIN_SHD........