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TPS81256SIPR Datasheet(PDF) 5 Page - Texas Instruments

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No. de pieza TPS81256SIPR
Descripción Electrónicos  High Efficiency Step-Up Converter In MicroSiP Packaging
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS81256SIPR Datasheet(HTML) 5 Page - Texas Instruments

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TPS81256
www.ti.com
SLVSAZ9C – JUNE 2012 – REVISED FEBRUARY 2016
Product Folder Links: TPS81256
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
(1)
Thermal data have been simulated with high-K board (per JEDEC standard).
7.4 Thermal Information
THERMAL METRIC(1)
TPS81256
UNIT
µSIP (SIP) – 9 PINS
RθJA
Junction-to-ambient thermal resistance
62
°C/W
ψJB
Junction-to-board characterization parameter
31
ψJT
Junction-to-case (top) thermal resistance
(1)
Maximum values can vary over lifetime due to intrinsic capacitor ageing effects. For more details, refer to Thermal and Reliability
Information section.
7.5 Electrical Characteristics
Minimum and maximum values are at VIN = 2.5V to 5.5V, VOUT = 5.0V (or VIN, whichever is higher), 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, VOUT
= 5.0V, EN = 1.8V, TA = 25°C (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
IQ
Operating quiescent current into VIN
(1)
IOUT = 0mA, VOUT = 5.0V, VIN = 3.6V
EN = VIN
Device not switching
30
50
µA
Operating quiescent current into VOUT
(1)
7
20
µA
ISD
Shutdown current(1)
EN = GND
0.85
5.0
μA
VUVLO
Under-voltage lockout threshold
Falling
2.0
2.1
V
Hysteresis
0.1
V
ENABLE
VIL
Low-level input voltage
0.4
V
VIH
High-level input voltage
1.0
V
Ilkg
Input leakage current
Input connected to GND or VIN
0.5
µA
OUTPUT
VOUT
Regulated DC output voltage
2.5V
≤ VIN ≤ 4.85V, IOUT = 0mA
PWM operation. Open Loop
4.92
5
5.08
V
3.3V
≤ VIN ≤ 4.85V, 0mA ≤ IOUT ≤ 550mA
PFM/PWM operation
4.85
5
5.2
V
2.9V
≤ VIN ≤ 4.85V, 0mA ≤ IOUT ≤ 450mA
PFM/PWM operation
4.85
5
5.2
V
ΔVOUT
Power-save mode output ripple voltage
PFM operation, IOUT = 1mA
35
mVpk
PWM mode output ripple voltage
PWM operation, IOUT = 200mA
8
mVpk
POWER SWITCH
rDS(on)
Input-to-output On-resistance
VI = 5.25 V. Device not switching
320
m
Ilkg
Reverse leakage current into VOUT(1)
EN = GND
5
µA
ILIM
Average input current limit
EN = VIN. VIN = 3.3V
1180
mA
Overtemperature protection
140
°C
Overtemperature hysteresis
20
°C
OSCILLATOR
fOSC
Oscillator frequency
VIN = 3.6V, VOUT = 5.0V, IOUT = 500mA
4
MHz
TIMING
Start-up time
IOUT = 0mA
Time from active EN to start switching
70
µs
IOUT = 0mA
Time from active EN to VOUT
400
µs
7.6 Typical Characteristics
Table 1. Table of Graphs
FIGURE
η
Efficiency
vs Output current
Figure 1, Figure 3
vs Input voltage
Figure 2


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