Datasheet

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ELECTRICAL CHARACTERISTICS
TPS62240 , TPS62242 , TPS62243
SLVS762B – JUNE 2007 – REVISED SEPTEMBER 2007
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
IN
Input voltage range 2 6 V
2.3 V ≤ V
IN
≤ 6 V 300
I
OUT
Output current mA
2 V ≤ V
IN
≤ 2.3 V 150
I
OUT
= 0 mA. PFM mode enabled (MODE = GND)
15
device not switching
µ A
I
OUT
= 0 mA. PFM mode enabled (MODE = GND)
I
Q
Operating quiescent current 18.5
device switching, V
OUT
= 1.8 V,
(1)
I
OUT
= 0 mA, switching with no load (MODE = V
IN
),
3.8 mA
PWM operation , V
OUT
= 1.8 V, V
IN
= 3 V
I
SD
Shutdown current EN = GND 0.1 1 µ A
Falling 1.85
UVLO Undervoltage lockout threshold V
Rising 1.95
ENABLE, MODE
V
IH
High level input voltage, EN, MODE 2 V ≤ V
IN
≤ 6 V 1 V
IN
V
V
IL
Low level input voltage, EN, MODE 2 V ≤ V
IN
≤ 6 V 0 0.4 V
I
IN
Input bias current, EN, MODE EN, MODE = GND or VIN 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 180 380
Forward current limit MOSFET
I
LIMF
VIN = VGS = 3.6 V 0.56 0.7 0.84 A
high-side and low side
TSD Thermal shutdown Increasing junction temperature 140 ° C
Thermal shutdown hysteresis Decreasing junction temperature 20 ° C
OSCILLATOR
f
SW
Oscillator frequency 2 V ≤ V
IN
≤ 6 V 2 2.25 2.5 MHz
OUTPUT
V
OUT
Adjustable output voltage range 0.6 V
IN
V
V
ref
Reference Voltage 600 mV
MODE = V
IN
, PWM operation, 2 V ≤ V
IN
≤ 6 V, in
Feedback voltage – 1.5% 0% 1.5%
fixed output voltage versions V
FB
= V
OUT
, See
(2)
V
FB
Feedback voltage PFM mode MODE = GND, device in PFM mode 0%
Load regulation -0.5 %/A
t
Start Up
Start-up Time Time from active EN to reach 95% of V
OUT
nominal 500 µ s
t
Ramp
V
OUT
ramp UP time Time to ramp from 5% to 95% of V
OUT
250 µ s
I
lkg
Leakage current into SW pin V
IN
= 3.6 V, V
IN
= V
OUT
= V
SW
, EN = GND,
(3)
0.1 1 µ A
(1) See the parameter measurement information.
(2) for V
IN
= V
O
+ 0.6
(3) In fixed output voltage versions, the internal resistor divider network is disconnected from FB pin.
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Product Folder Link(s): TPS62240 TPS62242 TPS62243