Datasheet

TPS62560, TPS62561
TPS62562
www.ti.com SLVS815C –JANUARY 2008–REVISED DECEMBER 2009
ELECTRICAL CHARACTERISTICS
Over full operating ambient temperature range, typical values are at T
A
= 25°C. Unless otherwise noted, specifications apply
for condition V
IN
= EN = 3.6 V. External components C
IN
= 4.7 μF 0603, C
OUT
= 10 μF 0603, L = 2.2 μH; see the Parameter
Measurement Information section.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
V
IN
Input voltage range 2.5 5.5 V
I
OUT
Output current V
IN
2.5 V to 5.5 V 600 mA
I
OUT
= 0 mA, PFM mode enabled
15
(MODE = GND), device not switching
μA
I
OUT
= 0 mA, PFM mode enabled
(MODE = GND), device switching, V
OUT
= 1.8 V, 18.5
I
Q
Operating quiescent current
See
(1)
I
OUT
= 0 mA, switching with no load
(MODE = V
IN
), PWM operation, V
OUT
= 1.8 V, 3.8 mA
V
IN
= 3 V
I
SD
Shutdown current EN = GND 0.5 μA
Falling 1.85
UVLO Undervoltage lockout threshold V
Rising 1.95
ENABLE, MODE
High-level input voltage, EN,
V
IH
2 V ≤ V
IN
≤ 5.5 V 1 V
IN
V
MODE
Low-level input voltage, EN,
V
IL
2 V ≤ V
IN
≤ 5.5 V 0 0.4 V
MODE
I
IN
Input bias current, EN, MODE EN, MODE = GND or V
IN
0.01 1 μA
POWER SWITCH
High side MOSFET on-resistance 252 492
R
DS(on)
V
IN
= V
GS
= 3.6 V, T
A
= 25°C mΩ
Low side MOSFET on-resistance 194 391
Forward current limit, high and low
I
LIMF
V
IN
= V
GS
= 3.6 V 0.8 1 1.2 A
side MOSFET
Thermal shutdown Increasing junction temperature 140
T
SD
°C
Thermal-shutdown hysteresis Decreasing junction temperature 20
OSCILLATOR
f
SW
Oscillator frequency 2 V ≤ V
IN
≤ 5.5 V 2.25 MHz
OUTPUT
V
OUT
Adjustable-output voltage range 0.85 V
IN
V
V
OUT
TPS62562 fixed output voltage V
IN
≥ 1.8 V 1.8 V
V
ref
Reference voltage 600 mV
MODE = V
IN
, PWM operation, for
Feedback voltage, PWM mode fixed-output-voltage versions V
FB
= V
OUT
, –2.5% 0% 2.5%
2.5 V ≤ V
IN
≤ 5.5 V, 0 mA ≤ I
OUT
≤ 600 mA
(2)
V
FB
MODE = GND, device in PFM mode, voltage
Feedback voltage, PFM mode 1%
positioning active
(1)
Load regulation PWM mode –1 %/A
Time from active EN to reach 95% of V
OUT
t
Start Up
Start-up time 500 μs
nominal
t
Ramp
V
OUT
ramp-up time Time to ramp from 5% to 95% of V
OUT
250 μs
I
lkg
Leakage current into SW terminal V
IN
= 3.6 V, V
IN
= V
OUT
= V
SW
, EN = GND
(3)
0.5 1 μA
(1) In PFM mode, the internal reference voltage is set to typ. 1.01 × V
ref
. See the Parameter Measurement Information section.
(2) For V
IN
= V
OUT
+ 0.6 V
(3) In fixed-output-voltage versions, the internal resistor divider network is disconnected from the FB terminal.
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