Datasheet

TPS62590
www.ti.com SLVS897B –JANUARY 2009– REVISED APRIL 2011
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 = 3.6V. External components C
IN
= 10μF 0603, C
OUT
= 10μF 0603, L = 2.2μH, refer to parameter
measurement information.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
V
I
Input voltage range 2.5 5.5 V
V
IN
2.7 V to 5.5 V 1000
I
O
Output current mA
V
IN
2.5 V to 2.7 V 600
I
O
= 0 mA, PFM mode enabled
(MODE = GND) device not switching, 15 μA
See
(1)
I
Q
Operating quiescent current
I
O
= 0 mA, switching with no load
(MODE = V
IN
) PWM operation, 3.8 mA
V
O
= 1.8 V, 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, 2.5 V ≤ V
IN
≤ 5.5 V 1 V
IN
V
IH
V
MODE
Low level input voltage, EN, 2.5 V ≤ V
IN
≤ 5.5 V 0 0.4
V
IL
V
MODE
I
I
Input bias current, EN, MODE EN, MODE = GND or V
IN
0.01 1 μA
POWER SWITCH
High-side MOSFET on-resistance 250
R
DS(on)
V
IN
= V
GS
= 3.6 V, T
A
= 25°C mΩ
Low-side MOSFET on-resistance 190
Forward current limit MOSFET
I
LIMF
V
IN
= V
GS
= 3.6 V 1.19 1.4 1.68 A
high-side and low-side
Thermal shutdown Increasing junction temperature 140
T
SD
°C
Thermal shutdown hysteresis Decreasing junction temperature 20
OSCILLATOR
f
SW
Oscillator frequency 2.5 V ≤ V
IN
≤ 5.5 V 2.25 MHz
OUTPUT
V
O
Adjustable output voltage range 0.75 V
I
V
V
ref
Reference voltage 600 mV
MODE = V
IN
, PWM operation,
V
FB(PWM)
Feedback voltage –2.5% 0% 2.5%
2.5 V ≤ V
IN
≤ 5.5 V, See
(2)
MODE = GND, device in PFM mode,
V
FB(PFM)
Feedback voltage PFM mode 1%
+1% voltage positioning active, See
(1)
Load regulation –1 %/A
Time from active EN to reach 95% of 500
t
Start Up
Start-up time μs
V
O
t
Ramp
V
O
ramp-up time Time to ramp from 5% to 95% of V
O
250 μs
V
I
= 3.6 V, V
I
= V
O
= V
SW
, EN = GND,
I
lkg
Leakage current into SW pin 0.1 1 μA
See
(3)
(1) In PFM mode, the internal reference voltage is set to typ. 1.01 × V
ref
. See the parameter measurement information.
(2) For V
IN
= V
O
+ 1 V
(3) In fixed output voltage versions, the internal resistor divider network is disconnected from FB pin.
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