Refer to the PDF data sheet for device specific package drawings
The TPS6112x devices provide a complete power supply solution for products powered by either a one-cell Li-Ion or Li-Polymer by either a one-cell Li-Ion or Li-Polymer battery, or a two- to four-cell Alkaline, NiCd, or NiMH battery. The devices can generate two stable output voltages that are either adjusted by an external resistor divider or are fixed internally on the chip. The device also provides a simple solution for generating 3.3 V out of a one-cell Li-Ion or Li-Polymer battery at a maximum output current of at least 200 mA with supply voltages down to 1.8 V. The implemented boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. The maximum peak current in the boost switch is limited to a value of 1600 mA.
The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. A low-EMI mode is implemented to reduce ringing and, in effect, lower radiated electromagnetic energy when the converter enters discontinuous conduction mode. A power good output at the boost stage simplifies control of any connected circuits like cascaded power supply stages or microprocessors.
The built-in LDO can be used for a second output voltage derived either from the boost output or directly from the battery. The LDO can be enabled separately that is, using the power good of the boost stage. The device is packaged in a 16-pin VQFN (RSA) package measuring 4 mm x 4 mm or in a 16-pin TSSOP (PW) package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS61120 | TSSOP (16) | 5.00 mm × 4.40 mm |
VQFN (16) | 4.00 mm × 4.00 mm | |
TPS61121 | TSSOP (16) | 5.00 mm × 4.40 mm |
TPS61122 |
Changes from C Revision (April 2004) to D Revision
PART NUMBER(2) | OUTPUT VOLTAGE DC-DC | OUTPUT VOLTAGE LDO |
---|---|---|
TPS61120PW | Adjustable | Adjustable |
TPS61121PW | 3.3 V | 1.5 V |
TPS61122PW | 3.6 V | 3.3 V |
TPS61120RSA | Adjustable | Adjustable |
TPS61121RSA | 3.3 V | 1.5 V |
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | NO. | |||
TSSOP | VQFN | |||
EN | 7 | 5 | I | DC-DC-enable input. (1: VBAT enabled, 0: GND disabled) |
FB | 15 | 13 | I | DC-DC voltage feedback of adjustable versions |
GND | 12 | 10 | I/O | Control/logic ground |
LBI | 5 | 3 | I | Low battery comparator input (comparator enabled with EN) |
LBO | 13 | 11 | O | Low battery comparator output (open drain) |
LDOEN | 8 | 6 | I | LDO-enable input (1: LDOIN enabled, 0: GND disabled) |
LDOOUT | 10 | 8 | O | LDO output |
LDOIN | 9 | 7 | I | LDO input |
LDOSENSE | 11 | 9 | I | LDO feedback for voltage adjustment, must be connected to LDOOUT at fixed output voltage versions |
SWP | 1 | 15 | I | DC-DC rectifying switch input |
PGND | 3 | 1 | I/O | Power ground |
PGOOD | 14 | 12 | O | DC-DC output power good (1: good, 0 : failure) (open drain) |
SKIPEN | 6 | 4 | I | Enable/disable power save mode (1: VBAT enabled, 0: GND disabled) |
SWN | 2 | 16 | I | DC-DC switch input |
VBAT | 4 | 2 | I | Supply pin |
VOUT | 16 | 14 | O | DC-DC output |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Input voltage | FB | –0.3 | 3.6 | V |
SWN, SWP | –0.3 | 10 | V | |
VOUT, LDOIN, LDOOUT, LDOEN, LDOSENSE, PGOOD, LBO, VBAT, LBI, SKIPEN, EN | –0.3 | 7 | V | |
Maximum junction temperature TJ | –40 | 150 | °C | |
Storage temperature Tstg | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±750 |
MIN | NOM | MAX | UNIT | |
---|---|---|---|---|
Supply voltage at VBAT, VI | 1.8 | 5.5 | V | |
Operating ambient temperature range, TA | –40 | 85 | °C | |
Operating virtual junction temperature range, TJ | –40 | 125 | °C |
THERMAL METRIC(1) | TPS61120, TPS61121, TPS61122 | TPS61120 | UNIT | |
---|---|---|---|---|
PW (TSSOP) | RSA (VQFN) | |||
16 PINS | 16 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 100.5 | 33.9 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 35.8 | 36.3 | °C/W |
RθJB | Junction-to-board thermal resistance | 45.4 | 11 | °C/W |
ψJT | Junction-to-top characterization parameter | 2.6 | 0.5 | °C/W |
ψJB | Junction-to-board characterization parameter | 44.8 | 11 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | n/a | 2.2 | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
DC-DC STAGE | |||||||
VI | Input voltage range | 1.8 | 5.5 | V | |||
VO | Adjustable output voltage range (TPS61120) | 2.5 | 5.5 | V | |||
Vref | Reference voltage |
485 | 500 | 515 | mV | ||
f | Oscillator frequency |
400 | 500 | 600 | kHz | ||
ISW | Switch current limit | VOUT= 3.3 V | 1100 | 1300 | 1600 | mA | |
Startup current limit | 0.4 * ISW | mA | |||||
SWN switch on resistance | VOUT= 3.3 V | 200 | 350 | mΩ | |||
SWP switch on resistance | VOUT= 3.3 V | 250 | 500 | mΩ | |||
Total accuracy (including line and load regulation) | -3% | ±3% | |||||
DC-DC quiescent current |
into VBAT | IO= 0 mA, VEN = VBAT = 1.8 V, VOUT = 3.3 V, ENLDO = 0 |
10 | 25 | µA | ||
into VOUT | IO = 0 mA, VEN = VBAT = 1.8 V, VOUT = 3.3 V, ENLDO = 0 |
10 | 25 | µA | |||
DC-DC shutdown current | VEN= 0 V | 0.2 | 1 | µA | |||
LDO STAGE | |||||||
VI(LDO) | Input voltage range | 1.8 | 7 | V | |||
VO(LDO) | Adjustable output voltage range (TPS61120) | 0.9 | 5.5 | V | |||
IO(max) | Output current | 200 | 320 | mA | |||
LDO short circuit current limit | 500 | mA | |||||
Minimum voltage drop | IO= 200 mA | 300 | mV | ||||
Total accuracy (including line and load regulation) | IO≥ 1 mA | ±3% | |||||
Line regulation | LDOIN change from 1.8 V to 2.6 V at 100 mA, LDOOUT = 1.5 V | 0.6% | |||||
Load regulation | Load change from 10% to 90%, LDOIN = 3.3 V |
0.6% | |||||
LDO quiescent current | LDOIN = 7 V, VBAT = 1.8 V, EN = VBAT | 20 | 30 | µA | |||
LDO shutdown current | LDOEN = 0 V, LDOIN = 7 V | 0.1 | 1 | µA | |||
CONTROL STAGE | |||||||
VIL | LBI voltage threshold | VLBI voltage decreasing | 490 | 500 | 510 | mV | |
LBI input hysteresis | 10 | mV | |||||
LBI input current | EN = VBAT or GND | 0.01 | 0.1 | µA | |||
LBO output low voltage | VO = 3.3 V, IOI = 100 µA | 0.04 | 0.4 | V | |||
LBO output low current | 100 | µA | |||||
LBO output leakage current | VLBO = 7 V | 0.01 | 0.1 | µA | |||
VIL | EN, SKIPEN input low voltage | 0.2 × VBAT | V | ||||
VIH | EN, SKIPEN input high voltage | 0.8 × VBAT | V | ||||
VIL | LDOEN input low voltage | 0.2 × VLDOIN | V | ||||
VIH | LDOEN input high voltage | 0.8 × VLDOIN | V | ||||
EN, SKIPEN input current | Clamped on GND or VBAT | 0.01 | 0.1 | µA | |||
Power-Good threshold | VO = 3.3 V | 0.9*VO | 0.92*VO | 0.95*VO | V | ||
Power-Good delay | 30 | µs | |||||
Power-Good output low voltage | VO = 3.3 V, IOI = 100 µA | 0.04 | 0.4 | V | |||
Power-Good output low current | 100 | µA | |||||
Power-Good output leakage current | VPG = 7 V | 0.01 | 0.1 | µA | |||
Overtemperature protection | 140 | °C | |||||
Overtemperature hysteresis | 20 | °C |
FIGURE | |||
---|---|---|---|
BOOST CONVERTER | |||
Maximum output current | vs Input voltage | Figure 1, Figure 2 | |
Efficiency | vs Output current (TPS61120) (VO = 2.5 V, VI = 1.8 V) | Figure 3 | |
vs Output current (TPS61121) (VO = 3.3 V, VI = 1.8 V, 2.4 V) | Figure 4 | ||
vs Output current (TPS61120) (VO = 5.0 V, VI = 2.4 V, 3.3 V) | Figure 5 | ||
vs Input voltage (TPS61121) | Figure 6 | ||
Output voltage | vs Output current (TPS61121) | Figure 7 | |
No-load supply current into VBAT | vs Input voltage (TPS61121) | Figure 8 | |
No-load supply current into VOUT | vs Input voltage (TPS61121) | Figure 9 | |
LDO | |||
Maximum output current | vs Input voltage (VO = 2.5 V, 3.3 V) | Figure 10 | |
vs Input voltage (VO = 1.5 V, 1.8 V) | Figure 11 | ||
Output voltage | vs Output current (TPS61122) | Figure 12 | |
Dropout voltage | vs Output current (TPS61121, TPS61122) | Figure 13 | |
Supply current into LDOIN | vs LDOIN input voltage (TPS61121) | Figure 14 | |
PSRR | vs Frequency (TPS61121) | Figure 15 |