Datasheet

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ELECTRICAL CHARACTERISTICS
TPS62290 , TPS62291 , TPS62293
SLVS764C – JUNE 2007 – REVISED MARCH 2008
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
= 4.7 µ F 0603, C
OUT
= 10 µ F 0603, L = 2.2 µ H, refer to parameter
measurement information.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
V
I
Input voltage range 2.3 6 V
V
IN
2.7 V to 6 V 1000
I
O
Output current V
IN
2.5 V to 2.7 V 600 mA
V
IN
2.3 V to 2.5 V 300
I
O
= 0 mA, PFM mode enabled
(MODE = GND) device not switching, 15 µ A
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
= 3V
I
SD
Shutdown current EN = GND 0.1 1 µ A
Falling 1.85
UVLO Undervoltage lockout threshold V
Rising 1.95
ENABLE, MODE
High level input voltage, EN, 2.3 V ≤ V
IN
≤ 6 V 1 V
IN
V
IH
V
MODE
Low level input voltage, EN, 2.3 V ≤ V
IN
≤ 6 V 0 0.4
V
IL
V
MODE
I
I
Input bias current, EN, MODE EN, MODE = GND or V
IN
0.01 1 µ A
POWER SWITCH
High side MOSFET on-resistance 240 480
R
DS(on)
V
IN
= V
GS
= 3.6 V, T
A
= 25 ° C m Ω
Low side MOSFET on-resistance 185 380
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 2.3 V ≤ V
IN
≤ 6 V 2.0 2.25 2.5 MHz
OUTPUT
V
O
Adjustable output voltage range 0.6 V
I
V
V
ref
Reference voltage 600 mV
MODE = V
IN
, PWM operation,
V
FB(PWM)
Feedback voltage – 1.5 0 1.5
2.3 V ≤ V
IN
≤ 6 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 - 0.5 %/A
Time from active EN to reach 95% of 500
t
Start Up
Start-up time µ s
V
O
t
Ramp
V
O
ramp-up time Time to ramp from 5% to 95% of V
O
250 µ s
V
I
= 3.6 V, V
I
= V
O
= V
SW
, EN = GND,
I
lkg
Leakage current into SW pin 0.1 1 µ A
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
+ 1.0 V
(3) In fixed output voltage versions, the internal resistor divider network is disconnected from FB pin.
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