LTC3577EUFF#PBF Linear Technology, LTC3577EUFF#PBF Datasheet - Page 8

• Manufacturer Part Number: LTC3577EUFF#PBF
• Description: IC PWR MANAGEMENT HANDHELD 44QFN
• Manufacturer: Linear Technology

Specifications of LTC3577EUFF#PBF

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 4.35 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

ELECTRICAL CHARACTERISTICS
LTC3577/LTC3577-1
full operating temperature range, otherwise specifi cations are at T
enabled unless otherwise noted.
SYMBOL
I
V
R
LDO Regulator 2 (LDO2 – Enabled via I
V
V
I
I
I
V
I
I
I
V
R
LED Boost Switching Regulator.
specifi cations are at T
SYMBOL
V
I
V
I
I
I
R
I
f
V
I
D
V
8
LDO1_SC
QLDO2_VO
QLDO2_VI
VINLDO2
LDO2_FB
LDO2_OC
LDO2_SC
VOUT_LED
LIM
LED_FS
LED_DIM
NSWOFF
OSC
LED_OV
DROP1
INLDO2
OUT_UVLO
LDO2_FB
DROP2
IN3
LED_OV
LED_FS
BOOSTFB
LDO1_PD
LDO2_PD
NSWON
BOOST
, V
OUT
PARAMETER
Short-Circuit Output Current
Dropout Voltage (Note 12)
Output Pull-Down Resistance in Shutdown
Input Voltage Range
V
V
LDO2 V
LDO2 V
Shutdown Current
LDO2_FB Regulated Output Voltage
LDO2_FB Line Regulation (Note 11)
LDO2_FB Load Regulation (Note 11)
LDO2_FB Input Current
Available Output Current
Short-Circuit Output Current
Dropout Voltage (Note 12)
Output Pull-Down Resistance in Shutdown
PARAMETER
Operating Supply Range
Operating Quiescent Current
Shutdown Quiescent Current
LED_OV Overvoltage Threshold
Peak NMOS Switch Current
I
I
R
NMOS Switch-Off Leakage Current
Oscillator Frequency
LED_FS Pin Voltage
LED_OV Pin Current
Maximum Duty Cycle
Boost Mode I
LED
LED
OUT
OUT
DS(ON)
Pin Full-Scale Operating Current
Pin Full-Scale Dimming Range
Falling
Rising
OUT
INLDO2
of NMOS Switch
A
Quiescent Current
= 25°C. V
LED
Quiescent Current
Feedback Voltage
IN3
2
= V
C)
The
OUT
l
= 3.8V, R
denotes the specifi cations which apply over the full operating temperature range, otherwise
OV
CONDITIONS
(Note 9)
(Notes 10, 14)
LED_OV Rising
LED_OV Falling
64 Steps
V
R
I
CONDITIONS
LED
I
I
I
LDO1 Disabled
V
LDO2 is Disabled Below V
LDO2 Enabled, PON State, I
LDO2 Enabled, PON State, I
LDO2 Disabled, PON or POFF State
I
I
I
LDO2_FB = 0.8V
I
I
I
LDO2 Disabled
LDO1
LDO1
LDO1
LDO2
LDO2
LDO2
LDO2
LDO2
LDO1
SW
LED_FS
INLDO2
= 10M, R
= 0
= 5.5V
= 150mA, V
= 150mA, V
= 75mA, V
= 1mA
= 1mA, V
= 1mA to 150mA
= 150mA, V
= 150mA, V
= 75mA, V
LDO Regulators.
= 20k
≤ V
OUT
LED_FS
IN
A
+ 0.3V
INLDO1
INLDO1
= 1.65V to 5.5V
= 25°C. V
INLDO1
INLDO1
INLDO2
INLDO2
= 20k, boost regulator disabled unless otherwise noted.
= 1.8V
= 1.8V
= 3.6V
= 2.5V
= 3.6V
= 2.5V
OUT
LDO2
LDO2
INLDO1
UVLO
The
= 0mA
= 0mA
l
= V
denotes the specifi cations which apply over the
INLDO2
l
l
l
l
l
l
l
= V
OUT
1.65
0.78
MIN
MIN
0.95
–50
150
800
780
775
2.5
2.7
0.6
3.8
18
= V
BAT
= 3.8V, LDO1 and LDO2
1.125
1000
0.01
0.85
0.01
0.01
TYP
560
240
800
800
TYP
270
160
200
170
270
160
200
170
1.0
20
60
97
2.7
2.8
0.1
0.8
0.4
10
18
14
4
5
1200
MAX
1.25
MAX
0.82
820
825
5.5
1.3
4.2
260
320
280
260
320
280
22
5.5
2.9
30
50
1
2
1
μV/mA
UNITS
UNITS
mV/V
3577fa
MHz
mΩ
mA
mA
mV
mV
mA
mV
mV
mV
mA
mA
mV
mV
mV
kΩ
kΩ
μA
μA
nA
μA
μA
dB
μA
μA
μA
%
V
V
V
V
V
V
V