Trusignal
Microelectronics
TS6112-xx
April 2018
ULTRA LOW QUIESCENT CURRENT 250mA
LOW-DROPOUT VOLTAGE REGULATORS
Features
Product Description
250-mA Low-Dropout Voltage Regulator
Available in 1.5V,1.8V,2.5V,2.7V,
2.8V,3.0V,3.3V,5.0V, Fixed Output and
Adjustable Versions
Dropout Voltage to 140 mv (typ) at 250 mA
(TS6112-33)
Ultra-Low 40-μA Typical Quiescent Current
Open Drain Power Good Output
Compatible with Low ESR Capacitor
Thermal Shutdown Protection
8-Pin SOIC Package
Applications
Battery-Powered Applications
Power Converter/Inverter
Portable Devices
POWER SUPPLY RIPPLE REJECTION
vs
FREQUENCY
PSRR - Power Supply Rijection -dB
90
VI = 4.3V
CO = 10μF
IO = 250mA
80
70
The TS6112-xx series regulators are designed to have
ultra-low quiescent currents and be stable with low ESR
ceramic output capacitors and a wide range of
capacitance (0.1μF or greater). The combination of the
above characteristics provides high performance at
lower cost.
The TS6112-xx series is designed with very low dropout
voltages (e.g. typically 200 mV for the TS6112-33 at an
output current of 250 mA). The quiescent current is very
low at light load (typically 40 μA at 10uA load), however,
it is designed to be dependent of output loading
(approximately 1/250 of the output current at heavy
load), in order to provide much improved control loop
stability and fast transient response. The low quiescent
feature yields a significant improvement in operating life
for battery-powered systems. This LDO family also
features a sleep mode; applying a TTL high signal to EN
(enable) shuts down the regulator, reducing the
quiescent current to less than 1μA (typ).
Power good (PG) is an active high output, which can be
used to implement a power-on reset or a low-battery
Indicator.
The TS6112-xx is offered in 1.5V, 1.8V, 2.5V, 2.7V,
2.8V, 3.0V, 3.3V and 5.0V fixed-voltage versions and in
an adjustable version (programmable over the range of
1.25 V to 5.5 V). Output voltage tolerance is specified
as a maximum of 3% over line, load, and temperature
ranges. The TS6112-xx family is available in 8 pin SOIC
package.
60
50
40
30
20
10
100
1K
10K
100K
1M
10M
f - Frequency - HZ
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TS6112-xx
PIN CONFIGURATION AND FUNCTIONS
SO-8 PACKAGE
(TOP VIEW)
NC/FB 1
8 OUT
PG 2
7 OUT
GND 3
6 IN
EN 4
5 IN
NAME
EN
FB/NC
GND
IN
IN
OUT
OUT
PG
TERMINAL
NO
4
1
3
5
6
7
8
2
I/O
I
I
I
I
O
O
O
DESCROPTION
Enable input
Feedback input voltage for adjustable device (no connect for fixed option)
Regulator ground
Input voltage
Input voltage
Regulated output voltage
Regulated output voltage
PG output
TYPICAL APPLICATION
VI
5
6
IN
PG
IN
NC/FB
OUT
4
0.1μF
2
PG
1
7
VO
8
OUT
EN
GND
4.7μF
Figure 1. Typical Application Configuration for Fixed Output Options
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TS6112-xx
RECOMMENDED OPERATING CONDITIONS
Input voltage, VIN [1]
MIN
2.7
Output voltage range, VOUT
1.2
5
V
0
250
mA
-40
125
℃
Output current, IOUT [2]
Operating virtual junction temperature, TA [2]
MAX
12
UNIT
V
[1] To calculate the minimum input voltage for your maximum output current, use the following equation: VIN(min) = VOUT(max) + VDO (max
load).
[2] Continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the device
operate under conditions beyond those specified in this table for extended periods of time.
ESD CAUTION
ABSOLUTE MAXIMUM RATINGS
Parameter
Input voltage range
Voltage range at EN
PG voltage
Peak output current
Output voltage, VOUT
(OUT, FB)
Junction Temperature
Storage Temperature
Range
Min
-0.3
-0.3
Max
14
16.5
16.5
Internally limited
Unit
V
V
V
7
V
-40
125
C
-65
150
C
±2000
V
ESD HBM
ESD (electrostatic discharge) sensitive
device
Charged devices and circuit boards can
discharge without detection. Although this
product features patented or proprietary
protection circuitry, damage may occur on
devices subjects to high energy ESD.
Therefore, proper ESD precautions should
be taken to avoid performance degradation
or loss of functionality.
ORDERING INFORMATION
Model
Part Number
Eco Plan
Package
OUTPUT VOLTAGE (V)
Container, Pack Qty
TS6112-50
TS6112-50SO8R
Rohs
SO-8
5.0
Reel,2500
TS6112-33
TS6112-33SO8R
Rohs
SO-8
3.3
Reel,2500
TS6112-30
TS6112-30SO8R
Rohs
SO-8
3.0
Reel,2500
TS6112-28
TS6112-28SO8R
Rohs
SO-8
2.8
Reel,2500
TS6112-27
TS6112-27SO8R
Rohs
SO-8
2.7
Reel,2500
TS6112-25
TS6112-25SO8R
Rohs
SO-8
2.5
Reel,2500
TS6112-18
TS6112-18SO8R
Rohs
SO-8
1.8
Reel,2500
TS6112-15
TS6112-15SO8R
Rohs
SO-8
1.5
Reel,2500
TS6112-01
TS6112-01SO8R
Rohs
SO-8
Adjustable(1.25V to 5.5V)
Reel,2500
The TS6112-01 is programmable using an external resistor divider.
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TS6112-xx
ELECTRICAL CHARACTERISTICS: At TA = +25C, Vi = Vo (type) + 1 V, Io = 10μA,
EN= 0V, CO=4.7μF,
unless otherwise noted. Boldface limits apply over the specified temperature range, TA = −40C to +125C.
Symbol
Parameter
Operating Conditions
Min
Typ
Max
TS6112-01
TS6112-15
TS6112-18
TS6112-25
VOUT
Output voltage [3]
(10uA to 250mA load)
TS6112-27
TS6112-28
TS6112-30
TS6112-33
TS6112-50
IGND
5.5V≥VOUT≥1.25V
TA = −40C to +125C
0.97VOUT
2.7V≤VIN≤12V
TA = −40C to +125C
1.455
1.8
2.5
2.7
2.716
(GND current)
3.090
3.3
3.250
3.350
5.0
4.850
EN = 0V
Quiescent current [3]
2.884
2.910
5.0 ≤ VIN ≤ 12V
TA = −40C to +125C
5.150
40
60
TA = −40C to +125C
Output voltage line regulation [3][4]
VOUT + 1V ≤ VIN ≤ 12 V,
0.005
Load regulation
IOUT = 10μA to 250mA
TA = −40C to +125C
0.5%
Output noise voltage
BW = 300Hz to 50kHZ, COUT =4.7μF
150
Output current Limit
VOUT = 0V
(ΔVO/VO)
V
3.0
4.3 ≤ VIN ≤ 12V
TA = −40C to +125C
2.781
2.8
4.0 ≤ VIN ≤ 12V
TA = −40C to +125C
2.575
2.619
3.8 ≤ VIN ≤ 12V
TA = −40C to +125C
1.854
2.425
3.7 ≤ VIN ≤ 12V
TA = −40C to +125C
1.545
1.746
3.5 ≤ VIN ≤ 12V
TA = −40C to +125C
1.03VOUT
1.5
2.8 ≤ VIN ≤ 12V
TA = −40C to +125C
Unit
VOUT
μA
%/V
μVrms
0.87
A
Thermal shutdown junction temperature
150
℃
Thermal shutdown hysteresis temperature
20
℃
ISTB
IFB
EN = VIN , 2.7V≤VIN≤12V
Standby current
FB input current
TS6112-01
FB = 1.5V
High level enable input voltage
TA = −40C to +125C
VILEN
Low level enable input voltage
TA = −40C to +125C
PSRR
[3]
IEN
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10
TA = −40C to +125C
VIHEN
PG
1
μA
nA
2
V
2
0.8
V
f = 1kHz, IOUT = 10μA, COUT = 4.7μF
67
dB
Minimum input voltage for valid
PG
IO (PG) = 300μA
1.25
V
Trip threshold voltage
VOUT decreasing
TA = −40C to +125C
Hysteresis voltage
Measured at VOUT
0.5
%/VOUT
Output low voltage
VIN = 2.7V, IO(PG) = 1mA
0.16
V
Leakage current
V(PG) = 5 V
TA = −40C to +125C
Power supply ripple rejection
92
EN = 0V
-1
EN = VIN
-1
98
0
1
μA
1
μA
1
μA
Input current (EN)
4
%/VOUT
Trusignal
Microelectronics
TS6112-xx
ELECTRICAL CHARACTERISTICS: At TA = +25C, Vi = Vo (type) + 1 V, Io = 10μA,
EN= 0V, CO=4.7μF,
unless otherwise noted. Boldface limits apply over the specified temperature range, TA = −40C to +125C.
Symbol
Parameter
Operating Conditions
IOUT = 250mA
TA = −40C to +125C
IOUT = 250mA
TA = −40C to +125C
IOUT = 250mA
TA = −40C to +125C
IOUT = 250mA
TA = −40C to +125C
TS6112-28
VDO
Dropout voltage
Min.
TS6112-30
[5]
TS6112-33
TS6112-50
Typ.
Max.
Unit
310
540
270
470
200
mV
400
140
250
[3] Minimum IN operating voltage is 2.7 V or VOUT (typ.) + 1V, whichever is greater. Maximum IN voltage 12V
[4] If VOUT≤ 1.8V then VINmin =2.7 V, VINmax = 12 V：
Line Reg.(mV) =
VOUT (V
- 2.7V)
100
× 1000 × (%/V)
If VOUT ≥ 2.5V then VINmin = VOUT + 1V, VINmax = 12 V：
Line Reg.(mV) =
VOUT (V
- (VOUT+1V))
× 1000 × (%/V)
100
[5] In voltage equals VOUT(typ.) – 100mV; TS6112-01 out voltage set to 3.3V nominal with external resistor divider. TS6112-15, TS6112-18,
TS6112-25, and TS6112-27 dropout voltage limited by input voltage range limitations (i.e., TS6112-30 input voltage needs to drop to 2.9 V for
purpose of this test).
Table of Graphs
FIGURE
vs Load current
vs Free-air temperature
vs Load current
vs Free-air temperature
vs Free-air temperature
vs Frequency
Output voltage
Ground current
Dropout voltage
Power supply ripple rejection
Line transient response
Load transient response
Output voltage
Output spectral noise density
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vs Time
vs Frequency
5
2
3
4
7
5
6
8
9
10
11
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Microelectronics
TS6112-xx
TYPICAL CHARACTERISTICS
TS6112-33
TS6112-33
OUTPUT VOLTAGE VS LOAD CURRENT
OUTPUT VOLTAGE VS FREE-AIR TEMPERATURE
3.301
3.31
VIN= 4.3V
TA = 25℃
3.3
VIN= 4.3V
3.3
VO-Output volatge -V
VO-Outout Voltage -V
3.299
3.298
3.297
3.296
3.295
3.294
3.29
3.28
IOUT = 10uA
3.27
3.26
IOUT = 250mA
3.293
3.25
3.292
3.24
3.291
0
50
100
150
200
-50
250
-25
0
50
75
100
125
150
TA - Free-Air Temperature - ℃
IL - Load Current - mA
Figure2
Figure 3
TS6112-33
TS6112-33
GROUND CURRENT VS LOADCURRENT
DROPOUT VOLTAGE VS FREE-AIR TEMPRATURE
1200
1
VIN = 4.3V
TA = 25℃
VIN = 3.2V
IOUT = 250mA
VDO-Output Voltage -V
1000
IQ - Ground Current - μA
25
800
600
400
0.1
IOUT=150mA
IOUT = 50mA
0.01
IOUT =
10mA
200
0.001
0
0
25
50
75
100
125
150
175
200
225
-50
250
0
25
50
75
100
TA - Free-Air Temperature - ℃
IL - load Current - mA
Figure4
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-25
Figure5
6
125
150
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Microelectronics
TS6112-xx
TYPICAL CHARACTERISTICS
POWER SUPPLY RIPPLE REJECTION VS
FREQUENCY
TS6112-33
GROUND CURRENT VS FREE-AIR TEMPEARTURE
90
50
IGND - Grond Current - μA
80
PSRR - Power Supply Rijection -dB
VI = 4.3V
IO = 0uA
TA =25℃
VIN = 4.3V
COUT = 10μF
IOUT = 250mA
TA = 25℃
70
60
50
40
45
40
35
30
30
20
10
100
1K
10K
100K
1M
-50
10M
0
50
Figure6
Figure7
TS6112-33
LOAD TRANSIENT RESPONSE
△VOUT - Change in
Output Voltage - mV
△VOUT - Change in
Output Voltage - mV
TS6112-33
LINE TRANSIENT RESPONSE
30
COUT = 4.7μF
20
TA= 25℃
10
IOUT - Output Current - mA
VIN - Input Voltage - V
0
5.3
4.3
REV KY.1.0.3
100
200
300
400
500
150
TA - Free -Air Temperature - ℃
f - Frequency - HZ
0
100
600
700
800
900
100
50
0
CL = 4.7
μF
T = 25℃
-50
250
0
0
100
10000
10000
200
300
400
500
t –Time - μs
t –Time - μs
Figure8
Figure9
7
600
700
800
900
Trusignal
Microelectronics
TS6112-xx
TYPICAL CHARACTERISTICS
TS6112-33
TS6833
OUTPUT SPECTRAL NOISE DENSITY
VS
FREQUENCY
OUTPUT VOLTAGE VS TIME (AT STATUP)
10
3
Output Spectral Noise Densitv - μV/√Hz
Enable Pulse –V
VOUT - Output Voltage - V
4
2
1
0
4.3
0
0
100
200
300
400
500
600
700
800
900
10000
IOUT = 150mA
1
0.1
VIN= 4.3V
COUT = 10μF
TA= 25℃
O
0.01
100
t –Time - μs
1000
10000
f - Frequency - Hz
Figure10
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IOUTI ==1mA
1mA
Figure11
8
100000
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TS6112-xx
APPLICATION INFORMATION
The TS6112-XX family includes eight fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, 2.7 V, 2.8 V, 3.0 V, 3.3
V, and 5.0 V), and an adjustable regulator, the TS6112-XX (adjustable from 1.25 V to 5.5 V).
Device operation
The TS6112-xx features very low quiescent current, which remains virtually constant even with varying loads.
Conventional LDO regulators use a pnp pass element, the base current of which is directly proportional to the load
current through the regulator (IB = IC/). The TS6112-xx uses a PMOS transistor to pass current; because the gate
of the PMOS is voltage driven, operating current is low and invariable over the full load range.
Another pitfall associated with the pnp-pass element is its tendency to saturate when the device goes into dropout.
The resulting drop in forces an increase in IB to maintain the load. During power up, this translates to large startup currents. Systems with limited supply current may fail to start up. In battery-powered systems, it means rapid
battery discharge when the voltage decays below the minimum required for regulation. The TS6112-xx quiescent
current remains low even when the regulator drops out, eliminating both problems.
The TS6112-xx family also features a shutdown mode that places the output in the high-impedance state (essentially
equal to the feedback-divider resistance) and reduces quiescent current to 1 A (typ). If the shutdown feature is not
used, EN should be tied to ground. Response to an enable transition is quick; regulated output voltage is
reestablished in typically 160 s.
Minimum load requirements
The TS6112-xx family is stable even at zero load; no minimum load is required for operation.
FB - pin connection (adjustable version only)
The FB pin is an input pin to sense the output voltage and close the loop for the adjustable option. The output
voltage is sensed through a resistor divider network to close the loop as it is shown in Figure 29. Normally, this
connection should be as short as possible; however, the connection can be made near a critical circuit to improve
performance at that point. Internally, FB connects to a high-impedance wide-bandwidth amplifier and noise pickup
feeds through to the regulator output. Routing the FB connection to minimize/avoid noise pickup is essential.
External capacitor requirements
The input capacitor is not required usually, however, a ceramic bypass capacitor (0.1μF or greater) improves load
transient performance. A higher capacitance capacitor may be necessary if large load transients with fast rise times
are anticipated.
The TS6112-XX series regulators require output capacitors to stabilize the internal feedback loop, however, the
ESR (the equivalent series resistance) of the output capacitor is not necessary. Instead, the ESR should be limited
to under 1Ω for the benefit of higher phase margin under large load current. The capacitance of the output capacitor
should be greater than 0.1μF, though the recommended capacitance for this capacitor is 4.7μF or larger.
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APPLICATION INFORMATION
External capacitor requirements (continued)
VI
5
6
IN
PG
IN
NC/FB
1
4
250K
7
OUT
0.1μF
PG
2
VO
8
OUT
EN
GND
4.7μF
Figure12. Typical Application Circuit (Fixed Version)
Programming the TS6112-01 adjustable LDO regulator
The output voltage of the TS6112-01 adjustable regulator is programmed using an external resistor
divider as shown in Figure 29. The output voltage is calculated using:
Vo =Vref × (1+
Where
Vref = 1.224 V typ. (the internal reference voltage)
VO
)
Vref
Resistors R1 and R2 should be chosen from approximately 7-μA divider current . Lower value resistors can be
used but offer no inherent advantage and waste more power. Higher values should be avoided as leakage
currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 169
KΩ to set the divider current at 7μA and then calculate R1 using:
R1 = (
VI
VO
− 1) × R2
Vref
IN
PG
PG
250K
> 2.0V
EN
VO
OUT
R1
< 0.8V
FB
CO
GND
R2
Figure13. TS6112-01 Adjustable LDO Regulator Programming
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TS6112-xx
APPLICATION INFORMATION
Power-good indicator
The TS6112-xx features a power-good (PG) output that can be used to monitor the status of the regulator.
Internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal
regulated value, the PG output transistor turns on, taking the signal low. The open-drain output requires a pullup
resistor. If not used, it can be left floating. PG can be used to drive power-on reset circuitry or used as a lowbattery indicator.
Regulator protection
The TS6112-xx PMOS-pass transistor has a built-in back diode that conducts reverse currents when the input
Voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the
Input and is not internally limited. When extended reverse voltage is anticipated, external limiting may be
appropriate.
The TS6112-xx also features internal current limiting and thermal protection. During normal operation, the
TPS768xx limits output current to approximately 0.8 A (typ). When current limiting engages, the output voltage
scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross
device failure, care should be taken not to exceed the power dissipation ratings of the package. If the
temperature of the device exceeds 150℃(typ), thermal-protection circuitry shuts it down. Once the device has
cooled below 130℃(typ), regulator operation resumes.
power dissipation and junction temperature
Specified regulator operation is assured to a junction temperature of 125C; the maximum junction temperature
should be restricted to 125C under normal operating conditions. This restriction limits the power dissipation
the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits,
calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than
or equal to PD(max).
The maximum-power-dissipation limit is determined using the following equation:
PD(max)
=
TJ max
- TA
RθJA
Where
TJmax is the maximum allowable junction temperature
RθJA is the thermal resistance junction-to-ambient for the package, ie., 176℃/W for the 8-terminal
soic.
TA is the ambient temperature.
The regulator dissipation is calculated using:
PD(max) = (VI - VO) ×IO
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the
thermal protection circuit.
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TS6112-xx
MECHANICAL DIMENSIONS
SO-8 PACKAGE MECHANICAL DRAWING
θ
SO-8 PACKAGE MECHANICAL DATA
dimensions
symbol
millimeters
inches
min
max
min
max
A
5.8
6.2
0.2283
0.2441
A1
3.8
4
0.1496
0.1575
B
4.8
5
0.1890
0.1969
B1
B2
1.27
0.31
C
C1
0.0500
0.51
1.75MAX
0.1
0.25
0.0201
0.0689MAX
0.0039
0.0098
L
0.4
1.27
0.0157
0.0500
D
0.13
0.25
0.0051
0.0098
θ
0o
8o
0o
8o
CONTACT INFORMATION
Trusignal Microelectronics
Phone: +86 512-65923982
Fax: +86 512-65923995
Email: support@kunyuanic.com; sales@kunyuanic.com
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