LTC3553 Linear Technology Corporation, LTC3553 Datasheet - Page 6

• Manufacturer Part Number: LTC3553
• Description: Micropower USB Power Manager
• Manufacturer: Linear Technology Corporation

w w w . D a t a S h e e t . i n
PUSHBUTTON INTERFACE ELECTRICAL CHARACTERISTICS
LTC3553
The
V
SYMBOL
Pushbutton Timing Parameters (Note 11)
t
t
t
t
t
t
t
t
t
t
t
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3553 is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when overtemperature protection is
active. Continuous operation above the specifi ed maximum operating
junction temperature may result in device degradation or failure.
Note 4: V
Note 5: Total battery drain current represents the load a battery will see
in application due to quiescent currents drawn by the BAT pin (I
plus any current drawn from the V
buck input (BVIN pin) and LDO input (V
PowerPath output (V
must be added to I
seen in application.
6
PBSTAT_PW
EXTPWR
PON_UP
PON_DIS_BUCK
PON_DIS_LDO
PUP
PDN
ON_PBSTATL
ON_PBSTATH
ON_PUP
ON_HR
BAT
l
= 3.8V, unless otherwise noted.
denotes specifi cations that apply over the full operating temperature range, otherwise specifi cations are at T
CC
is the greater of V
PARAMETER
Minimum ON Low Time to Cause
PBSTAT Low
Delay from ON High to PBSTAT High
Minimum ON Low Time to Enter
Power-Up (PUP1 or PUP2) State
Minimum ON Low Time to Hard Reset
PBSTAT Minimum Pulse Width
Power-Up from USB Present to
Power-Up (PUP1 or PUP2) State
BUCK_ON or LDO_ON High to Power-On
State
BUCK_ON Low to Buck Disabled
LDO_ON Low to LDO Disabled
Power-Up (PUP1 or PUP2) State Duration
Power-Down (PDN1 or PDN2) State
Duration
BATQ
OUT
to get the actual battery drain current that will be
pin), the quiescent currents on BVIN and V
BUS
OUT
or BAT.
pin. In applications where the
INLDO
pin) are connected to the
CONDITIONS
ON Brought Low During Power-On (PON) or
Power-Up (PUP1, PUP2) States
Power-On (PON) State, After PBSTAT Has Been
Low for at Least t
Starting in the Hard Reset (HR) or Power-Off
(POFF) States
ON Brought Low During the Power-On (PON) or
Power-Up (PUP1, PUP2) States
Power-On (PON) or Power-Up (PUP1, PUP2)
States
Starting in the Hard Reset (HR) or Power-Off
(POFF) States
Starting with Both BUCK_ON and LDO_ON Low
in the Power-Off (POFF) State
BATQ
INLDO
)
PBSTAT_PW
Note 6: h
current with specifi ed PROG resistor.
Note 7: The current limit features of this part are intended to protect
the IC from short term or intermittent fault conditions. Continuous
operation above the absolute maximum specifi ed pin current rating may
result in device degradation or failure.
Note 8: BUCK_FB High, Not Switching
Note 9: V
Note 10: Measured with the LDO operating in unity-gain, with its output
and feedback pins tied together.
Note 11: See the Operation section of this data sheet for detailed
explanation of the pushbutton state machine and the effects of each
state on regulator and power manager operation.
Note 12: If V
the ideal diode is equal to its current times R
Note 13: Dropout voltage is the minimum input to output voltage
differential needed for the LDO to maintain regulation at a specifi ed
output current. When the LDO is in dropout, its output voltage will be
equal to: V
C/10
OUT
INLDO
BUS
not in UVLO.
is expressed as a fraction of programmed full charge
– V
< V
DROP
UVLO
.
then V
FWD
MIN
= 0 and the forward voltage across
40
4
DROPOUT
TYP
900
400
100
900
50
50
5
1
1
5
1
.
A
= 25°C.
MAX
6
UNITS
3553f
ms
ms
ms
ms
μs
μs
μs
μs
s
s
s