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PDF TPS61256C Data sheet ( Hoja de datos )
| Número de pieza | TPS61256C | |
| Descripción | 3.5-MHz High Efficiency Step-Up Converter | |
| Fabricantes | Texas | |
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TPS61256C
SLVSDQ1 – FEBRUARY 2017
TPS61256xC 3.5-MHz High Efficiency Step-Up Converter In Chip Scale Packaging
1 Features
•1 93% Efficiency at 3.5-MHz Operation
• 37-µA Quiescent Current in Normal Operation
• Wide VIN Range From 2.3 V to 5.5 V
• Support VIN ≥ VOUT Operation
• ±2% Total DC Voltage Accuracy
• Light-Load PFM Mode
• Pass-through Mode by Pulling EN Low
• Thermal Shutdown and Overload Protection
• Only Three Surface-Mount External Components
Required
• Total Solution Size < 25 mm2
• 9-Pin NanoFree™ (CSP) Packaging
2 Applications
• NFC PA Supply
• Cell Phones, Smart Phones
• Mono and Stereo APA Applications
• USB Charging Ports
3 Description
The TPS61256xC device provides a power supply
solution for battery-powered portable applications.
Intended for low-power applications, the
TPS61256xC supports up to 800-mA load current
from a battery discharged as low as 2.65 V and
allows the use of low cost chip inductor and
capacitors.
With a wide input voltage range of 2.3 V to 5.5 V, the
device supports applications powered by Li-Ion
batteries with extended voltage range. Different fixed
voltage output versions are available from 3.15 V to
5.0 V.
The TPS61256xC operates at a regulated 3.5-MHz
switching frequency and enters power-save mode
operation at light load currents to maintain high
efficiency over the entire load current range. The
PFM mode extends the battery life by reducing the
quiescent current to 37 μA (typ) during light load
operation.
In addition, the TPS61256xC device can also support
the pass-through mode by pulling EN to low. In this
mode, the output voltage follows the input voltage
with a voltage drop by the resistance of the inductor
and high-side FET.
The TPS61256xC offers a very small solution size
due to minimum amount of external components. It
allows the use of small inductors and input capacitors
to achieve a small solution size.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61256xC
DSBGA (9)
1.206 mm × 1.306 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Load Current
100 VO = 5.0 V
90
80
70
60
50
40
.
30
20
10
0
VI - Input Voltage - V
I O - Output Current - mA
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
1 page  
www.ti.com
TPS61256C
SLVSDQ1 – FEBRUARY 2017
7.5 Electrical Characteristics
Minimum and maximum values are at VIN = 2.3V to 5.5V, EN = 1.8V, TA = –40°C to 85°C; Circuit of Parameter Measurement
Information section (unless otherwise noted). Typical values are at VIN = 3.6V, EN = 1.8V, TA = 25°C (unless otherwise
noted).
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
SUPPLY CURRENT
IOUT = 0 mA, VIN = 3.6 V
Operating quiescent current
EN = VIN
into VIN Operating quiescent current
Device not switching
IQ
into VOUT pass-through mode quiescent current
into VIN pass-through mode quiescent current
into VOUT
IOUT = 0 mA, VIN = VOUT = 3.6 V
EN = GND,
Device not switching
30 45
7 15
11 20
9.5 15
µA
µA
µA
µA
VUVLO Under-voltage lockout threshold
Falling
Hysteresis
2.0 2.1
0.1
V
V
ENABLE
VIL_EN
VIH_EN
Ilkg_EN
OUTPUT
Low-level input voltage
High-level input voltage
Input leakage current
Input connected to GND or VIN
0.4 V
1.0 V
0.5 µA
VOUT
Regulated DC output voltage-TPS61256C
2.3 V ≤ VIN ≤ 4.85 V, IOUT = 0 mA
PWM operation. Open Loop
4.92 5 5.08 V
VOUT
Regulated DC output voltage-TPS612562C
2.3 V ≤ VIN ≤ 4.85 V, IOUT = 0 mA
PWM operation. Open Loop
5.12 5.2 5.28 V
VOUT
Regulated DC output voltage-TPS612564C
2.3 V ≤ VIN ≤ 4.85 V, IOUT = 0 mA
PWM operation. Open Loop
5.31 5.4 5.49 V
ΔVOUT Power-save mode output ripple voltage
POWER SWITCH
PFM operation, IOUT = 1 mA
50 mVpk
rDS(on)
High-side MOSFET on resistance
Low-side MOSFET on resistance
170
mΩ
100
Switch valley current limit
EN = VIN, Open Loop
ILIM
Pre-charge / pass-through mode current limit
(linear mode)
TPS61256xC
1900 2150 2400
500
mA
Overtemperature protection
140 °C
Overtemperature hysteresis
20 °C
OSCILLATOR
fOSC
Oscillator frequency
TIMING
VIN = 3.6 V, VOUT = 4.5 V
3.5 MHz
Start-up time
IOUT = 0 mA.
Time from active EN to start switching
IOUT = 0 mA.
Time from active EN to VOUT
70 µs
400 µs
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: TPS61256C
Submit Documentation Feedback
5
5 Page 
www.ti.com
TPS61256C
SLVSDQ1 – FEBRUARY 2017
Device Functional Modes (continued)
9.4.2 Pass-Through Mode
When EN is pulled to low and Vin above UVLO, the device works in the pass-through mode and the output
voltage of TPS61256xC follows the input voltage level. In so called pass-through mode, the synchronous rectifier
is current limited to 500 mA (min.). The output voltage is slightly reduced due to voltage drop across the rectifier
MOSFET and the inductor DC resistance.
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: TPS61256C
Submit Documentation Feedback
11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet TPS61256C.PDF ] | |
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