The TPS6123x is a high current, high efficiency synchronous boost converter with constant output current feature for single cell Li-Ion and Li-polymer battery powered products, in a wide range of power bank, tablet, and other portable devices. The IC integrates 14-mΩ/14-mΩ power switches and is capable of delivering up to a 3.5-A output current for 3.3-V to 5-V conversion with up to 97% high efficiency. The device supports a programmable constant output current to control power delivery, so to save power path components and lower total system thermal dissipation effectively.
The device only consumes a 10-µA quiescent current under a light load condition, and can report load status to the system, which make it very suitable for Always-On applications. With the TPS6123x, a simple and flexible system design can be achieved, eliminating external power path components, saving PCB space, and reducing BOM cost.
In shutdown, the output is completely disconnected from the input, and current consumption is reduced to less than 1 µA. Other features like soft start control, reverse current blocking, over voltage protection, and thermal shutdown protection are built-in for system safety.
The devices are available in a 2.5-mm x 2.5-mm VQFN package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS61235P | VQFN (9) | 2.50 mm x 2.50 mm |
TPS61236P | VQFN (9) | 2.50 mm x 2.50 mm |
SPACING
Changes from * Revision (September 2015) to A Revision
PART NUMBER | OUTPUT VOLTAGE |
---|---|
TPS61235P | 5.1 V |
TPS61236P | Adjustable |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NUMBER | ||
PGND | 1 | PWR | Power ground. |
SW | 2 | PWR | The switch pin of the boost converter. It is connected to the drain of the internal Power MOSFETs. |
VIN | 3 | I | IC power supply input. |
CC | 4 | I | Constant output current programming pin. Connect a resistor to this pin to program the constant output current. A capacitor should be connected in parallel to stabilize the control loop. Connect this pin to the AGND pin to disable the constant output current function. |
AGND | 5 | I/O | Analog ground. |
FB | 6 | I | Voltage feedback pin of adjustable version (TPS61236P). Must be connected to VOUT pin on fixed output voltage version (TPS61235). |
EN | 7 | I | Enable logic input. Logic high enables the device. Logic low disables the device and puts it in shutdown mode. This pin must be terminated and cannot be left floating. An external pull down resistor connected to this pin is recommended. |
INACT | 8 | O | Load status indication. Open drain output. Can be left float or connected to AGND pin if not used. |
VOUT | 9 | PWR | Boost converter output. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Voltage(2) | VIN, EN, VOUT, CC, INACT, FB | –0.3 | 6 | V |
SW | –0.3 | 7 | V | |
Operating 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) | ±4000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±1500 |
MIN | NOM | MAX | UNIT | |||
---|---|---|---|---|---|---|
VIN(1) | Supply voltage at VIN pin | 2.3 | VOUT – 0.6 | V | ||
VOUT | Target output voltage (TPS61235P) | 5.1 | V | |||
Target output voltage (TPS61236P) | 2.9 | 5.5 | V | |||
L | Effective inductance | 0.7 | 1 | 1.3 | µH | |
CI | Effective input capacitance(2) | 4.7 | 10 | µF | ||
CO | Effective output capacitance(2) | 20 | µF | |||
CRCC | Capacitor parallel with the RCC resistor connected at CC pin | 1 | 10 | nF | ||
RINACT | INACT pin pull up resistance | 1 | MΩ | |||
REN | EN pin pull down resistance | 1 | MΩ | |||
TJ | Operating junction temperature | –40 | 125 | °C |
THERMAL METRIC(1) | TPS61235P | UNIT | |
---|---|---|---|
TPS61236P | |||
RWL (VQFN) | |||
9 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 28.7 | °C/W |
RθJC(top) | Junction-to-case(top) thermal resistance | 24.1 | °C/W |
RθJB | Junction-to-board thermal resistance | 10.9 | °C/W |
ψJT | Junction-to-top characterization parameter | 0.1 | °C/W |
ψJB | Junction-to-board characterization parameter | 10.8 | °C/W |
RθJC(bottom) | Junction-to-case(bottom) thermal resistance | 1.6 | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
POWER SUPPLY | |||||||
VIN | Input voltage | 2.3 | VOUT – 0.6 | V | |||
VUVLO | Input under voltage lockout | VIN rising | 2.2 | 2.3 | V | ||
Hysteresis | 125 | mV | |||||
IQ | Quiescent current into VIN | IC enabled, No Load, No switching, VOUT = 5.1 V |
5 | 11 | µA | ||
Quiescent current into VOUT | 5 | 30 | µA | ||||
ISD | Shutdown current into VIN | IC disabled, TJ = –40°C to 85°C | 0.01 | 3 | µA | ||
OUTPUT | |||||||
VOUT | Output voltage range | TPS61236P | 2.9 | 5.5 | V | ||
Output voltage | PWM mode, TPS61235P |
5.0 | 5.1 | 5.2 | V | ||
PFM mode, TPS61235 |
5.2 | V | |||||
VFB | Feedback voltage | PWM mode, TPS61236P |
1.219 | 1.244 | 1.269 | V | |
PFM mode, TPS61236P |
1.256 | V | |||||
VOVP | Output over voltage protection threshold | 5.60 | 5.80 | 5.93 | V | ||
ILKG_FB | Leakage current into FB pin | TPS61235P, VFB = 5.1 V | 4000 | nA | |||
TPS61236P, VFB = 1.244 V | 120 | nA | |||||
ILKG_SW | Leakage current into SW pin | IC disabled, TJ = –40°C to 85°C, VSW = 5.1 V |
0.05 | 2 | µA | ||
ILKG_VOUT | Leakage current into VOUT pin | IC disabled, TJ = –40°C to 85°C, VOUT = 5.1 V |
0.05 | 2 | µA | ||
Line regulation | IOUT = 2A, VIN = 2.7 V to 4.5 V, VOUT = 5.1 V |
0.06 | %/V | ||||
Load regulation | IOUT = 0.5 A to 3 A, VIN = 3.6 V, VOUT = 5.1 V |
0.06 | %/A | ||||
POWER STAGE | |||||||
RDS(on) | High side MOSFET on resistance | VOUT = 5.1 V | 14 | 30 | mΩ | ||
Low side MOSFET on resistance | VOUT = 5.1 V | 14 | 30 | mΩ | |||
fsw | Switching frequency | VOUT = 5.1 V, PWM mode | 750 | 1000 | 1250 | kHz | |
Constant output current limit accuracy | RCC = 124 kΩ, TJ = 25°C |
–15% | 15% | ||||
RCC = 61.9 kΩ, TJ = 25°C |
–10% | 10% | |||||
RCC = 61.9 kΩ, TJ = –20°C to 125°C |
–15% | 15% | |||||
ILIM | Switch valley current limit | TJ = –20°C to 100°C | 6.5 | 8 | 9.5 | A | |
ILIM_pre | Precharge mode current limit | VOUT = 0 V, TJ = 0°C to 125°C |
0.05 | 0.25 | 0.8 | A | |
VOUT = 2 V | 1.3 | A | |||||
VOUT = 3 V | 1.7 | A | |||||
IINACT_th | Inactive threshold | VOUT = 5.1 V | 50 | mA | |||
tINACT_delay | Deglitch delay | VOUT = 5.1 V | 15 | ms | |||
TSD | Thermal shutdown threshold | TJ rising | 140 | °C | |||
Hysteresis | 15 | °C | |||||
LOGIC INTERFACE | |||||||
VEN_H | EN Logic high input voltage | 1.0 | V | ||||
VEN_L | EN Logic low input voltage | 0.4 | V | ||||
ILKG_EN | EN pin input leakage current | EN pin connected to GND or VIN | 0.01 | 0.3 | µA | ||
VINACT | INACT pin output low level voltage | ISINK_INACT = 80 µA | 0.4 | V |
VOUT = 4.5 V (TPS61236P), CC pin connected to GND |
VOUT = 5.5 V (TPS61236P), CC pin connected to GND |
VOUT = 5.1 V (TPS61235P), VIN = 3.6 V, No Load |
3.6-V Input |
TA = 25°C |
VOUT = 5.1 V (TPS61235P), TA = 25°C |
VOUT = 5.1 V (TPS61235P), CC pin connected to GND |
VOUT = 5.1 V (TPS61235P), No Load, TA = 25°C |
TA = 25°C |
VOUT = 5.1 V (TPS61235P), CC pin connected to GND, TA = 25°C |
VIN = 3.6 V |
VOUT = 5.1 V (TPS61235P), RCC = 61.9 kΩ (CC current set to 2 A) |