MICROCHIP TC1014, TC1015, TC1185 User Manual

TC1014/TC1015/TC1185

50mA, 100mA and 150mA CMOS LDOs with Shutdown and Reference Bypass

Features

• Extremely Low Supply Current (50µA, Typ.)

• Very Low Dropout Voltage

• Choice of 50mA (TC1014), 100mA (TC1015) and
150mA (TC1016) Output

• High Output VoltageAccuracy

• Standard or Custom Output Voltages

• Power Saving Shutdown Mode

• Reference Bypass Input for Ultra Low-Noise
Operation

• Over Current and Over Temperature Protection

• Space-Saving 5-Pin SOT-23APackage

• Pin Compatible Upgrades for Bipolar Regulators

Applications

• Battery Operated Systems

• PortableComputers

• Medical Instruments

• Instrumentation

• Cellular/GSM/PHSPhones

• Linear Post-Regulator for SMPS

• Pagers

Device Selection Table

Part Number Package

TC1014-xxVCT 5-Pin SOT-23A -40°C to +125°C
TC1015-xxVCT 5-Pin SOT-23A -40°C to +125°C
TC1185-xxVCT 5-Pin SOT-23A -40°C to +125°C

NOTE: xx indicates output voltages. Available output
voltages: 1.8, 2.5, 2.6, 2.7, 2.8, 2.85, 3.0, 3.3, 3.6, 4.0, 5.0.

Other output voltages are available. Please contact Microchip
T echnology Inc. for details.

Junction

Temp. Range

Package Type

5-Pin SOT-23A

V

OUT

5

Bypass

4

TC1014
TC1015
TC1185

13

2

V

GND

IN

NOTE: 5-Pin SOT-23A is equivalentto the EIAJ (SC-74A)

SHDN



2002 Microchip TechnologyInc. DS21335B-page 1

TC1014/TC1015/TC1185

General Description

The TC1014/TC1015/TC1185 are high accuracy
(typically ±0.5%) CMOS upgrades for older (bipolar)
low dropout regulators such as the LP2980. Designed
specifically f or battery-operated systems, the devices’
CMOS construction eliminates wasted ground current,
significantly extending battery life. Totalsupply current
is typically 50µA at full load (20 to 60 times lower t han
in bipolar regulators).

The devices’ key features include ultra low noise oper­ation(plusoptionalBypass input),fastresponsetostep
changes in load, and very low dropout voltage –
typically 85mV (TC1014); 180mV (TC1015); and
270mV (TC1185)at full load. Supply current is reduced
to 0.5µA (max) and V
shutdown input is low. The devices incorporate both
over-temperature and over-currentprotection.

The TC1014/TC1015/TC1185 are stable with an output
capacitor of only 1µF and have a maximum output
current of 50mA, 100mA and 150mA, respectively. For
higher output current regulators, please see the
TC1107/TC1108/TC1173 (I

falls to zero when the

OUT

= 300mA) data sheets.

OUT

Typical Application

V

IN

Shutdown Control

(from Power Control Logic)

1

V

IN

TC1014
TC1015
TC1185

2

GND

3

SHDN

V

OUT

Bypass

5

4

V

OUT

+

1µF

470pF
Reference
Bypass Cap
(Optional)

DS21335B-page 2



2002 Microchip TechnologyInc.

TC1014/TC1015/TC1185

1.0 ELECTRICAL
CHARACTERISTICS

Absolute Maximum Ratings*

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

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

+0.3V)

IN

Stresses above those listed under "Absolute Maximum
Ratings" may cause permanentdamage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions 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 7)

Maximum Voltage on Any Pin .........V

OperatingTemperature Range...... -40°C < T

+0.3V to -0.3V

IN

< 125°C

J

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

TC1014/TC1015/TC1185 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: VIN=VR+1V,IL= 100µA, CL=3.3µF, SHDN >VIH,TA= 25°C, unless otherwise noted. Boldfa ce type

specifications apply for junction temperatures of -40°C to +125°C.

Symbol Parameter Min Typ Max Units Device Test Conditions

V

IN

I

OUTMAX

V

OUT

TCV

OUT

∆V

OUT

∆V

OUT/VOUT

V

IN-VOUT

I

IN

I

INSD

PSRR Power Supply Rejection

I

OUTSC

∆V

OUT

T

SD

∆T

SD

eN Output Noi se — 600 — nV/√Hz

Note 1: Theminimum VINhas to meet two conditions: VIN≥ 2.7VandVIN≥ VR+V

Input Operating Voltage 2.7 — 6.0 V Note 1
Maximum Outp ut Current 50

100
150

—
—
—

—
—
—

mA TC1014

TC1015

TC1185
Output Voltage VR–2.5% VR±0.5% VR+2.5% V Note 2
V

TemperatureCoefficient —

OUT

—

/∆VINLine Regul ation — 0.05 0.35 %(V

Load Regulation —

—

Dropout Voltage —

—
—
—
—

20

40

0.5

0.5

2
65
85

180
270

—
—

2
3

—
—

120
250
400

ppm/°C Note 3

+1V)≤ VIN ≤ 6V

R

% TC1014; TC1015

TC1185

IL= 0.1mA to I
IL= 0.1mA to I

(Note 4)

mV

TC1015; T C1185
TC1185

= 100µA

I

L

= 20mA

I

L

I

= 50mA

L

= 100mA

I

L

= 150mA (Note 5)

I

L

OUTMAX
OUTMAX

Supply Current (Note 8) — 50 80 µASHDN=VIH,IL=0
Shutdown Supply Current — 0.05 0.5 µASHDN=0V

Ratio

—64—dB F

Output S hort Circuit Current — 300 450 mA V

RE

OUT

≤ 1kHz

=0V

/∆PDThermal Regulation — 0.04 — V/W Notes 6, 7

Thermal Shutdown Die

— 160 — °C

Temperature
Thermal Shutdown

—10—°C

Hysteresis

IL=I
470pF f rom Bypass

OUTMAX

, F = 10kHz

to G ND

.

2: V

is the regulator output voltage setting. For example: VR= 1.8V, 2.5V, 2.6V,2.7V, 2.8V, 2.85V,3.0V, 3.3V, 3.6V,4.0V ,5.0V.

R

3:

TC V

=(V

OUT

OUTMAX–VOUTMIN

V

x ∆T

4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range

from 1.0mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal
regulation specification.

5: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value at a 1V

differential.

6: 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

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., T
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.

8: Apply for Junction Temperatures of -40°C to +85°C.

OUT

)x 10

6

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

A,TJ

DROPOUT

at VIN= 6V for T = 10 msec.

LMAX



2002 Microchip TechnologyInc. DS21335B-page 3

TC1014/TC1015/TC1185

TC1014/TC1015/TC1185 ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: VIN=VR+1V,IL=100µA, CL=3.3µF,SHDN >VIH,TA= 25°C, unless otherwise noted. Boldface type

specifications apply for junction temperatures of -40°C to +125°C.

Symbol Parameter Min Typ Max Units Test Conditions

SHDN Input

V

IH

V

IL

Note 1: TheminimumVINhas to meet two conditions: VIN≥ 2.7V and VIN≥ VR+V

SHDN Input High Threshold 45 — — %VINVIN=2.5Vto6.5V
SHDN Input Low T hre shold — — 15 %VINVIN=2.5Vto6.5V

.

2: V

is the regulator output voltage setting. For example: VR= 1.8V, 2.5V,2.6V, 2.7V, 2.8V,2.85V,3.0V, 3.3V, 3.6V, 4.0V, 5.0V.

R

3:

TC V

4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range

from 1.0mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal
regulation specification.

5: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value at a 1V

differential.

6: 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

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., T
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.

8: Apply for Junction Temperatures of -40°C to +85°C.

OUT

=(V

OUTMAX–VOUTMIN

V

x ∆T

OUT

)x 10

6

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

A,TJ

DROPOUT

at VIN= 6V for T = 10 msec.

LMAX

DS21335B-page 4



2002 Microchip TechnologyInc.

2.0 PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1: P IN FUNCTION TABLE

TC1014/TC1015/TC1185

Pin No.

(5-Pin SOT-23A)

1V
2 GND Ground terminal.
3 SHDN

4 Bypass Reference bypass input. Connecting a 470pF to this input further reduces output noise.
5V

Symbol Description

IN

OUT

Unregulatedsupply input.

Shutdown control input. The regulator is fully enabled when a logic high is applied to this input.
The regulator enters shutdown when a logic low is applied to this input. During shutdown,
output voltage falls to zero, ERROR
(max).

Regulated voltage output.

is open circuited and supply current is reduced to 0.5µA



2002 Microchip TechnologyInc. DS21335B-page 5

TC1014/TC1015/TC1185

3.0 DETAILED DESCRIPTION

The TC1014/TC1015/TC1185 are precision fixed
output voltage regulators. (If an adjustable version is
desired, please see the TC1070/TC1071/TC1187 data
sheet.) Unlike bipolar regulators, the TC1014/TC1015/
TC1185 supply current does not increase with load
current. In addition, V
regulation over the entire 0mA to I
load current ranges (an importantconsiderationi n RTC
and CMOS RAM battery back-up applications).

Figure 3-1 shows a typical application circuit. The
regulator is enabled any time the shutdown input
(SHDN

)isatoraboveVIH, and shutdown (disabled)

when SHDN

is at or below VIL. SHDN may be
controlled by a CMOS logic gate, or I/O port of a
microcontroller. If the SHDN
should be connected directly to the input supply. While
in shutdown, supply current decreases to 0.05µA
(typical), V

fallstozerovolts.

OUT

FIGURE 3-1: TYPICAL APPLICATION

V

+

+

Battery

IN

1µF

GND

remains stable and within

OUT

OUTMAX

input is not required, it

CIRCUIT

V

OUT

TC1014
TC1015
TC1185

operating

+

1µF

V

OUT

3.1 Bypass Input

A 470pF capacitor connected from the Bypass input to
ground reduces noise present on the internal
reference, which in turn significantly reduces output
noise.Ifoutputnoiseisnota concern,thisinputmaybe
left unconnected. Larger capacitor values may be
used, but results in a longer time period to rated output
voltage when power is initiallyapplied.

3.2 Output Capacitor

A1µF(min)capacitorfromV
The output capacitor should have an effective series
resistance greater than 0.1Ω and less than 5Ω.A1µF
capacitorshouldbeconnectedfrom V
is more t han 10 inches of wire between the regulator
and the AC filtercapacitor, or if a battery is used as the
power source. Aluminum electrolytic or tantalum
capacitor types can be used. (Since many aluminum
electrolytic capacitors freeze at approximately -30°C,
solid tantalums are recommended for applications
operating below -25°C.) When operating from sources
other than batteries, supply-noise rejection and
transient response can be improved by increasing the
value of the input and output capacitors and employing
passive filtering techniques.

to ground is required.

OUT

to GND if there

IN

SHDN

Shutdown Control

(to CMOS Logic or Tie

if unused)

to V

IN

Bypass

470pF
Reference
Bypass Cap
(Optional)

DS21335B-page 6



2002 Microchip TechnologyInc.