LTC3553 Linear Technology Corporation, LTC3553 Datasheet - Page 4

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

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LTC3553
POWER MANAGER ELECTRICAL CHARACTERISTICS
SYMBOL
Ideal Diode
V
R
I
Logic Inputs (HPWR, SUSP)
V
V
R
Logic Output (CHRG)
V
I
BUCK REGULATOR ELECTRICAL CHARACTERISTICS
The
BUCK_ON = V
SYMBOL
BVIN
V
f
I
R
Logic Input Pin (STBY)
Buck Regulator in Normal Operation (STBY Low)
I
V
D
R
R
Buck Regulator in Standby Mode (STBY High)
4
The
V
MAX
OSC
BUCK_FB
LIM
CHRG
FWD
IL
IH
OL
OUT
BUCK_FB
DROPOUT
PD
SW_PD
MAX
P
N
BUS
l
l
UVLO V
= 5V, V
denotes specifi cations that apply over the full operating temperature range, otherwise specifi cations are at T
denotes specifi cations that apply over the full operating temperature range, otherwise specifi cations are at T
PARAMETER
Forward Voltage Detection
Diode On-Resistance, Dropout
Diode Current Limit
Input Low Voltage
Input High Voltage
Internal Pull-Down Resistance
Output Low Voltage
Output Hi-Z Leakage Current
PARAMETER
Input Supply Voltage
Oscillator Frequency
BUCK_FB Input Current (Note 8)
SW Pull-Down in Shutdown
Input High Voltage
Input Low Voltage
Input Current
Peak PMOS Current Limit
Regulated Feedback Voltage
Max Duty Cycle
R
R
Feedback Voltage Threshold
Short-Circuit Current
Standby Mode Dropout Voltage
BAT
OUT
DS(ON)
DS(ON)
OUT
= 3.8V, HPWR = SUSP = BUCK_ON = LDO_ON = 0V, R
Undervoltage Lockout
= BVIN = 3.8V, unless otherwise noted.
of PMOS
of NMOS
CONDITIONS
(Note 12)
I
(Note 7)
I
V
CONDITIONS
(Note 9)
V
V
BUCK_ON = 0V
BUCK_ON = 3.8V (Note 7)
BUCK_ON = 3.8V
I
I
BUCK_ON = 3.8V, V
BUCK_ON = 2.9V, I
V
OUT
CHRG
SW
SW
OUT
BAT
OUT
OUT
= 100mA
= –100mA
= 200mA, V
= 4.5V, V
= 2.9V, BVIN = 2.9V
Falling
Rising
= 5mA
CHRG
BUS
SW
= 5V
BUCK_FB
= 0V
= 10mA, V
PROG
Falling
= 1.87k, STBY = high, unless otherwise noted.
BUCK_FB
= 0.76V,
l
l
l
–0.05
0.955
MIN
MIN
300
780
100
770
1.2
2.7
2.5
1.2
30
–1
1.125
TYP
TYP
240
500
800
800
2.6
2.8
0.7
65
1.1
50
50
15
10
1
4
0
A
A
= 25°C.
= 25°C,
1.295
MAX
MAX
0.05
250
650
820
820
100
100
0.4
5.5
2.9
0.4
1
1
UNITS
UNITS
MHz
3553f
mΩ
MΩ
mA
mA
mV
mV
mV
mV
mV
kΩ
μA
μA
μA
%
Ω
Ω
A
V
V
V
V
V
V
V