SC900A Просмотр технического описания (PDF) - Semtech Corporation
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SC900A Datasheet PDF : 23 Pages
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SC900A
POWER MANAGEMENT
Pin Descriptions
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
T
Pin Name Pin Function
LDOB LDO B output.
INB
Input supply for the digital system logic and the LDO B pass transistor.
SDA
Bidirectional open drain digital I/O pin. I2C serial data.
SCL
EN
A0
DGND
Digital input. I2C serial clock.
Digital input. High to enable part. Low to disable part (sleep mode).
Note I2C control is active only when part is enabled.
One bit address for connecting two SC900A devices on to the system through
the I2C interface.
Digital ground.
VASEL
LDOPGD
ARST
LDO A selection default voltage. Tie this pin to ground for 1.8V or INB for 2.8V.
Digital output. State change indicates that one of four LDO output voltages (A, C, D or E)
is out of spec. Note, desired state of pin is programmable through the I2C interface.
Digital output. State change indicates LDO A output voltage is out of spec.
Note, desired state of pin is programmable through the I2C interface.
VREF
Bandgap reference output voltage. Connect at least 0.1μF to ground (CVREF ≥ 0.1μF).
GND Analog ground.
VIN
Analog supply voltage.
INE
Input supply for the LDO E pass transistor.
LDOE LDO E output.
LDOD LDO D output.
INCD Input supply for the LDO C and LDO D pass transistors.
LDOC LDO C output.
INA
Input supply for the LDO A pass transistor.
LDOA
Thermal
Pad
LDO A output.
Thermal Pad for heatsinking purposes. Connect to ground plane using multiple vias.
Not connected internally.
© 2005 Semtech Corp.
8
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