Datasheet

LTC3562
3
3562fa
BUCK DC/DC ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the
full operating temperature range, otherwise specifi cations are at T
A
= 25°C, V
IN
= 3.8V, V
OUTx
= 1.5V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
IN
= 3.8V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
I
2
C Port
DV
CC
Operating Voltage
l
1.5 5.5 V
DV
CC
Operating Current DV
CC
= 1.8V, Serial Port Idle 1 μA
DV
CC
UVLO Threshold Voltage 1V
V
IL
SDA, SCL (Low Level Input Voltage) 0.3 • DV
CC
V
V
IH
SDA, SCL (High Level Input Voltage) 0.7 • DV
CC
V
V
OL
SDA (Digital Output Low) I
PULLUP
= 3mA 0.08 V
Serial Port Timing (Note 4)
t
SCL
Clock Operating Frequency 400 kHz
t
BUF
Bus Free Time Between Stop and Start Conditions 1.3 μs
t
HD,STA
Hold Time After (Repeated) Start Condition 0.6 μs
t
SU,STA
Repeated Start Condition Setup Time 0.6 μs
t
SU,STO
Stop Condition Setup Time 0.6 μs
t
HD,DAT(OUT)
Data Hold Time 225 ns
t
HD,DAT(IN)
Input Data Hold Time 0 900 ns
t
SU,DAT
Data Setup Time 100 ns
t
LOW
Clock Low Period 1.3 μs
t
HIGH
Clock High Period 0.6 μs
t
f
Clock Data Fall Time 20 300 ns
t
r
Clock Data Rise Time 20 300 ns
t
SP
Spike Suppression Time 50 ns
PARAMETER CONDITIONS MIN TYP MAX UNITS
Regulators R600A, R400A, R600B, R400B
f
OSC
1.91 2.25 2.59 MHz
Maximum Duty Cycle Pulse Skip Mode
100 %
LDO Mode Closed Loop R
OUT
LDO Mode 0.25
Ω
Regulators R600A, R600B
PMOS Switch Current Limit Pulse Skip Mode 850 1200 1500 mA
PMOS R
DS(ON)
0.38
Ω
NMOS R
DS(ON)
0.38
Ω
LDO Mode Open Loop R
OUT
LDO Mode 2.2
Ω
Available Output Current Forced Burst Mode
LDO, V
OUT
= 1.2V
75
50
140 mA
mA
SW Pull-Down in Shutdown Shutdown 2.5 kΩ