TS3310/12/14 Data Sheet
True 150 nA I
Q
, Selectable 1.8 to 5 V
OUT
Instant-On Boost Con-
verter
The TS3310/12/14 is a low power boost switching regulator with an industry leading low
quiescent current of 150 nA(typ). The 150 nA is the actual current consumed from the
battery while the output is in regulation. The TS3310’s extremely low power internal cir-
cuitry consumes 120 nA on average, with periodic switching cycles which service the
load occurring at intervals of up to 25 seconds, together yielding the average 150 nA.
The TS3310/12/14 steps up input voltages from 0.9 V (TS3312: 2 V) to 5 V to sixteen
selectable output voltages ranging from 1.8 V to 5 V. The TS3310/12/14 includes two
output options, one being an always-on storage output while the additional output is an
output load switch that is designed to supply burst-on loads in a low duty cycle manner.
The TS3310/12/14 operates in Discontinuous Conduction Mode with an on-time propor-
tional to 1/VIN, thereby limiting the maximum input current by the selection of the induc-
tor value, ensuring the input current does not drag down the input source.
The extremely low quiescent current combined with the output load switch make the
TS3310/12/14 an ideal choice for applications where the load can be periodically pow-
ered from the output, while being disconnected from the output storage capacitor when
the load is powered off to isolate the load’s leakage current.
The TS3310/12/14 is fully specified over the –40 °C to +85 °C temperature range and is
available in a low-profile, thermally-enhanced 10-pin 2x2 mm TDFN package with an ex-
posed back-side paddle.
Applications
• Coin-Cell-Powered Portable Equipment
• Single-Cell Lithium-Ion or Alkaline Battery-Powered Equipment
• Solar or Mechanical Energy Harvesting
• Wireless Microphones
• Wireless Remote Sensors
• RFID Tags
• Personal Health-Monitoring Devices
• ZigBee Radio Enabled Devices
• Low-Energy Bluetooth Radio Enabled Devices
KEY FEATURES
• Market-Leading, Active-Mode, No-load
Supply Current: I
Q
= 150 nA
• Efficiency up to 92%
• Input Voltage Range: 0.9 to 5.0 V
• Delivers up to 35 mA at V
STORE
from 1.2
V
IN
• Single Inductor, Discontinuous Conduction
Mode Operation
• User-Enabled Secondary Output Load
Switch to Isolate Leaky Burst Loads
• No External Schottky Diode Required
• UVLO Threshold
• 0.9 V (TS3310/14)
• 2.0 V (TS3312)
• Pin-Selectable Output Voltages:
• 1.8 V, 2.1 V, 2.5 V, 2.85 V, 3 V, 3.3 V,
4.1 V, 5 V (TS3310)
• 2.1 V, 2.5 V, 2.85 V, 3 V, 3.3 V, 4.1 V, 5
V (TS3312)
• 4 V, 4.2 V, 4.35 V, 4.5 V, 4.6 V, 4.7 V,
4.8 V, 4.9 V (TS3314)
• 10-pin, 2 mm × 2 mm TDFN Package
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TS3310/12/14 Data Sheet
Ordering Information
1. Ordering Information
Ordering Part Number
TS3310ITD1022
TS3312ITD1022
TS3314ITD1022
Description
Boost regulator with 0.9 V UVLO
Boost Regulator with 2 V UVLO
Boost Regulator with 0.9 V UVLO
Output Voltage Options (V)
1.8, 2.1, 2.5, 2.85, 3, 3.3, 4.1, 5
2.1, 2.5, 2.85, 3, 3.3, 4.1, 5
4, 4.2, 4.35, 4.5, 4.6, 4.7, 4.8, 4.9
Note:
1. Adding the suffix “T” to the part number (e.g., TS3310ITD1022T) denotes tape and reel.
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TS3310/12/14 Data Sheet
System Overview
2. System Overview
2.1 Typical Application Circuit
Table 2.1. Typical Application Circuit A and Circuit B Values
Circuit A
L
10 µH
PN: CBC3225T100KR
C
IN
= C
STORE
2.2 Functional Block Diagram
22 µF
Circuit B
100 µH
PN: CBC3225T101KR
2.2 µF
Figure 2.1. TS331x Functional Block Diagram
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TS3310/12/14 Data Sheet
System Overview
2.2.1 Theory of Operation
The TS3310/12/14 is a boost switching regulator with an industry leading low quiescent current of 150 nA.The 150 nA is the actual
current consumed from the battery while the output is in regulation. The TS3310/12/14’s extremely low power internal circuitry con-
sumes 120 nA on average, with periodic switching cycles which service the load occurring at intervals of up to 25 seconds, as displayed
in the scope captures titled “Input Quiescent Current : Circuit A with No-Load” in
3.1 Typical Performance Characteristics.
The always-
on output voltage at STORE is regulated by a comparator within the Regulation Control block. When a load discharges C
STORE
and
causes the output voltage to drop below the desired regulated voltage, switching periods are initiated. When the output voltage is at or
above the desired regulated voltage, the comparator causes switching periods to stop.
Each switching cycle includes an ON period and an OFF period. During the ON period, the NMOS switch turns on to ramp current in
the inductor, while during the OFF period, the NMOS switch turns off and the PMOS switch turns on to discharge inductor current into
the C
STORE
capacitor. When the ON and OFF cycles have completed, the PMOS switch turns off. The TS3310/12/14 operates in Dis-
continuous Conduction Mode (DCM); during any given switching cycle, the inductor current starts at and returns to zero. The switching
cycle timing is governed by the Control block, which determines the ON and OFF periods according to the input and output voltages,
regardless of the inductor current. The Control block sets the ON period according to the following equation:
t
ON
=
2.2 µs
V
IN
Equation 1. ON Period Calculation
Then, the choice of inductor value determines the peak switching currents:
I
pk
=
V
IN
×
t
ON
2.2 µs
=
L
L
Equation 2. Peak Current Calculation
The average input current, I
IN(AVG)
, will vary according to the load, since as the load is increased, the time between switching cycles is
decreased. However, I
IN(AVG)
will never exceed I
IN(AVG,MAX)
, the maximum averaged input current, which represents the case where
switching periods are continuously initiated.
I
IN
(AVG,MAX )
=
I
pk
2
=
1.1 µs
L
Equation 3. Maximum Average Input Current Calculation
The above equation shows that an input current limit can be set by choice of inductor value, set appropriately for the capacity and out-
put impedance of the input source.
Maximum available output current is also a function of inductor value for the case where switching cycles are continuously initiated, the
expected maximum STORE output current is:
I
STORE
(MAX )
=
V
IN
V
OUT
×
I
IN
(AVG,MAX )
× Efficiency
Equation 4. Expected Maximum STORE Current Calculation
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TS3310/12/14 Data Sheet
System Overview
2.2.2 Output Voltage Options
The Regulation Controls within the Control block monitor and control the regulation of the STORE output voltage. By strapping a combi-
nation of logic input pins (S0–S2) high or low, the STORE output voltage can be one of the selectable output voltages.
Table 2.2. STORE Output Value Options
S2
0
0
0
0
1
1
1
1
S2
0
0
1
1
0
0
1
1
S0
0
1
0
1
0
1
0
1
TS3310 STORE
1.8 V
2.5 V
3.3 V
5V
2.1 V
2.85 V
3V
4.1 V
TS3312 STORE
—
2.5 V
3.3 V
5V
2.1 V
2.85 V
3V
4.1 V
TS3314 STORE
4V
4.2 V
4.35 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
The TS3310/12/14 provides an additional Instant-On switched OUT output that completely isolates loads from the storage capacitor at
the STORE output. The OUT load switch is controlled by the logic input pin OUT_ON.
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