SC1109 Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Fabricante
SC1109 Datasheet PDF : 17 Pages
| |||
SYNCHRONOUS PWM CONTROLLER WITH
DUAL LOW DROPOUT REGULATOR
CONTROLLERS
SC1109
PRELIMINARY - October 16, 2000
ELECTRICAL CHARACTERISTICS (Cont.)
Unless specified: VOSENSE = VO; Vcc=4.75V to 5.25V; STBY=4.75V to 5.25V; BST = 11.4V to 12.6V; TA = 0 to 70°C
PARAMETER
SYM CONDITIONS
MIN TYP
Internal Drivers
Peak DH Source Current
IsourceDH BST-DH = 4.5V
500
Peak DH Sink Current
IsinkDH
DH-GND = 3.1V
500
DH-GND = 1.5V
100
Peak DL Source Current
IsourceDL VCC-DL = 4.5V
500
Peak DL Sink Current
IsinkDL
DL-GND = 3.1V
500
DL-GND = 1.5V
100
Dead time
Linear Sections
TDEAD
40 100
Standby Voltage
Standby Quiescent current
Tracking Difference(4)
Output Voltage LDO1
Output Voltage LDO2
Load Regulation
Line Regulation
LDOS(1,2) Output Impedance
LDOS(1,2) Input Impedance
Gain (AOL)(3)
LDO1 Gate Voltage
LDO2 Gate Voltage
VSTBY
ISTDBYQ
DeltaTRACK
VLDO1
VLDO2
LOADREG
LINEREG
ZOUT
ZIN
GAINLDO
VgateLDO1
VgateLDO2
VSTBY = 5V, SS/EN = 0V
IO = 0 to 4A, 3.3V Vin = 3.3V
IO = 0 to 4A, 3.3V Vin = 3.3V
IO = 0 to 4A, 3.3V Vin = 3.3V
3.3V Vin = 3.13V to 3.47V, Io
VGATE(1,2) = 6.5V
LDOS (1,2) to GATE (1,2)
VSTDBY = 5V
VSTDBY = 5V
4.4 5
200
1.782 1.818
2.475 2.525
0.3
0.3
1
10
50
8
7
MAX
5.25
5
1.854
2.575
1.5
UNITS
mA
mA
mA
mA
mA
mA
ns
V
mA
mV
V
V
%
%
kΩ
kΩ
dB
V
V
Notes:
(1) All electrical characteristics are for the application circuit on page 6.
(2) Soft start function is performed after Vcc is above the UVLO and SS/EN is above 600mV. The Soft start
capacitor is then charged at a 10uA constant current until SS/EN is charged to above 1V.
(3) Guaranteed by design
(4) Tracking Difference is defined as the delta between 3.3V Vin and the LDO1, LDO2 output voltages during the
linear ramp up until regulation is achieved.
© 2000 SEMTECH CORP.
3
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
Share Link: 