Microchip TC1072-1.8VCH713, TC1072-2.5VCH713, TC1072-2.6VCH713, TC1072-2.7VCH713, TC1072-2.85VCH713 Schematic

TC1072/TC1073

R

6

1

4

2

3

6-Pin SOT-23

V

OUT

ERROR

SHDNGNDV

IN

5

Bypass

50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and V

Features:

• 50 µA Ground Current for Longer Battery Life

• Very Low Dropout Voltage

• Choice of 50 mA (TC1072) and 100 mA (TC1073) Output

• High Output Voltage Accuracy

• Standard or Custom Output Voltages

• Power-Saving Shutdown Mode

• ERROR

Output Can Be Used as a Low Battery

Detector or Processor Reset Generator

• Bypass Input for Ultra Quiet Operation

• Overcurrent and Overtemperature Protection

• Space-Saving 6-Pin SOT-23 Package

• Pin Compatible Upgrades for Bipolar Regulators

• Standard Output Voltage Options:

- 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3.0V,

3.3V, 3.6V, 4.0V, 5.0V

• Other output voltages are available. Please contact Microchip Technology Inc. for details.

Applications:

• Battery Operated Systems

• Portable Computers

• Medical Instruments

• Instrumentation

• Cellular/GSM/PHS Phones

• Linear Post-Regulators for SMPS

• Pagers

General Description

The TC1072 and TC1073 are high accuracy (typically ±0.5%) CMOS upgrades for older (bipolar) low dropout regulators. Designed specifically for battery-operated systems, the devices’ CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current is typically 50 µA at full load (20 to 60 times lower than in bipolar regulators).

The devices’ key features include ultra low noise operation (plus optional Bypass input); very low dropout voltage (typically 85 mV, TC1072 and 180 mV, TC1073 at full load) and fast response to step changes in load. An error output (ERROR

) is asserted when the devices are out-of-regulation (due to a low input voltage or excessive output current). ERROR used as a low battery warning or as a processor

signal (with the addition of an external RC

RESET network). Supply current is reduced to 0.5 µA (max) and both V

and ERROR

OUT

are disabled when the shutdown input is low. The devices incorporate both overtemperature and overcurrent protection.

The TC1072 and TC1073 are stable with an output capacitor of only 1 µF and have a maximum output current of 50 mA, and 100 mA, respectively. For higher output current versions, please see the TC1185, TC1186, TC1187 (I TC1108 and TC1173 (I

= 150 mA) and TC1107,

OUT

= 300 mA) data sheets.

OUT

Package Type

Bypass

REF

can be

Typical Application Circuit

R

P

V

1

IN

V

IN

TC1072 TC1073

2

GND

3

Shutdown Control

(from Power Control Logic)

SHDN

V

OUT

Bypass

ERROR

6

5

4

+

1 µF

C

BYPASS

470 pF

V

OUT

ERRO

TC1072/TC1073

TC V

OUT

= (V

OUTMAX

– V

OUTMIN

) x 10

6

V

OUT

x ΔT

1.0 ELECTRICAL CHARACTERISTICS

† Note: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions

Absolute Maximum Ratings†

Input Voltage .........................................................6.5V

Output Voltage...........................(-0.3V) to (V

+ 0.3V)

IN

above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.

Power Dissipation................Internally Limited (Note 6)

Maximum Voltage on Any Pin ........ VIN +0.3V to -0.3V

Operating Temperature Range...... -40°C < T

< 125°C

J

Storage Temperature..........................-65°C to +150°C

TC1072/TC1073 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: Unless otherwise noted, VIN=V Boldface type specifications apply for junction temperatures of -40°C to +125°C.

Symbol Parameter Min Typ Max Units Test Conditions

V

IN

I

OUTMAX

V

OUT

TCV

OUT

ΔV

OUT

ΔV

OUT/VOUT

V

IN-VOUT

I

IN

I

INSD

Input Operating Voltage 2.7 — 6.0 V Note 9

Maximum Output Current 50

Output Voltage VR –

V

Temperature Coefficient —

OUT

/ΔVINLine Regulation — 0.05 0.35 %(VR + 1V) ≤ VIN ≤ 6V

Load Regulation — 0.5 2.0 %IL = 0.1 mA to I

Dropout Voltage —

Supply Current — 50 80 µA SHDN

Shutdown Supply Current — 0.05 0.5 µA SHDN

PSRR Power Supply Rejection Ratio — 64 — dB F

I

OUTSC

ΔV

T

SD

ΔT

OUT

SD

Output Short Circuit Current — 300 450 mA V

/ΔPDThermal Regulation — 0.04 — V/W Notes 5, 6

Thermal Shutdown Die Temperature — 160 — °C

Thermal Shutdown Hysteresis — 10 — °C

eN Output Noise — 260 — nV/√Hz

Note 1: VR is the regulator output voltage setting. For example: VR= 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 4.0V, 5.0V.

2:

+ 1V, IL= 0.1 mA, CL=3.3μF, SHDN

OUT

100

— —

VR ±0.5% VR + 2.5% V Note 1

2.5%

—

40

2

20

— — —

65 85

180

— —

120 250

>VIH, TA=+25°C.

mAmATC1072

TC1073

ppm/°C Note 2

(Note 3)

mV I

=0.1mA

L

I

=20mA

L

IL=50mA IL= 100 mA (Note 4), TC1073

RE

OUT

IL=I 470 pF from Bypass to GND

=VIH, IL= 0 (Note 8)

=0V

≤ 1kHz

=0V

OUTMAX

3: 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.

4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value. 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 I

6: 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., T thermal shutdown. Please see Section 5.0 “Thermal Considerations” for more details.

7: Hysteresis voltage is referenced by V 8: Apply for Junction Temperatures of -40°C to +85°C.

9: The minimum VIN has to justify the conditions = VIN≥ VR+V

, TJ, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate

A

.

R

DROPOUT

at VIN=6V for T=10 ms.

LMAX

and VIN≥ 2.7V for IL= 0.1 mA to I

OUTMAX

.

TC1072/TC1073

TC V

OUT

= (V

OUTMAX

– V

OUTMIN

) x 10

6

V

OUT

x ΔT

TC1072/TC1073 ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: Unless otherwise noted, VIN=V Boldface type specifications apply for junction temperatures of -40°C to +125°C.

+ 1V, IL= 0.1 mA, CL=3.3μF, SHDN

OUT

>VIH, TA= +25°C.

Symbol Parameter Min Typ Max Units Test Conditions

SHDN Input

V

IH

V

IL

ERROR

V

INMIN

V

OL

V

TH

V

HYS

t

DELAY

Note 1: VR is the regulator output voltage setting. For example: VR= 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 4.0V, 5.0V.

SHDN

Input High Threshold 45 — — %VINVIN= 2.5V to 6.5V

Input Low Threshold — — 15 %VINVIN= 2.5V to 6.5V

SHDN

Open Drain Output

Minimum VIN Operating Voltage 1.0 — — V

Output Logic Low Voltage — — 400 mV 1 mA Flows to ERROR

ERROR Threshold Voltage — 0.95 x V

— V See Figure 4-2

R

ERROR Positive Hysteresis — 50 — mV Note 7

V

to ERROR