SH3100IMTR SEMTECH [Semtech Corporation], SH3100IMTR Datasheet - Page 54

• Manufacturer Part Number: SH3100IMTR
• Description: Supervisory IC with I2C Interface and PWM
• Manufacturer: SEMTECH [Semtech Corporation]

I
The I
diode protection only to GND. This allows VDD to collapse without affecting the common bus. Input stages include
input hysteresis and glitch fi ltering to allow handling of noisy inputs. High levels and rise times are set by external
pull-up resistors on SCL and SDA.
Multi-Function Output: PWM
Multi mode pad with function determine by operating mode selection. Includes diode protection to VDD and GND.
Mode 1 is a standard digital output powered from VDD. Used for general-purpose PWM drive, fan speed control, or
switching regulation using external switching transistors.
Mode 2 is for bootstrap boost regulation with internal switching. PWM is pulled Low to energize the inductor and then
set High Impedance to allow energy transfer to VDD through the protection diode. Mode 3 is the power output from
the LDO.
© 2006 Semtech Corp.
2
POWER MANAGEMENT
Pad Specifi cations
C Communication: SCL & SDA
Parameter
Vout High (Mode 1, VDD > 3.3 V, Ioh = 4 mA)
Vout Low (Mode 1 or 2, VDD > 3.3 V, Iol = 4 mA)
Vout High (Mode 1, VDD > 1.7 V, Ioh = 1 mA)
Vout Low (Mode 1 or 2, VDD > 1.7 V, Iol = 1 mA)
Pad rise time (Mode 1, 10 pF load)
Pad fall time (Mode 1 or 2, 10 pF load)
LDO output voltage range (Mode 3)
2
C pads are designed to comply with the 400kHz (Fast) I
Parameter
Maximum operating frequency
Vout Low (Iol = 3 mA, VDD > 2V)
Vout Low (Iol = 3 mA, VDD < 2V)
Vin High
Vin Low
Input hysteresis (VDD > 2 V)
Input hysteresis (VDD < 2 V)
Input glitch rejection
Input leakage
Input capacitance
Output fall time (Load Cb = 10 pF to 400 pF)
(continued)
54
Symbol
Voh1
Voh2
Vol1
Vol2
Vldo
Min
V
V
Tr
Tf
V
V
2
F
T
C
V
V
HYS
HYS
T
I
C specifi cation. The pads are open drain outputs with
OL
OL
IN
OP
SP
IH
IN
IL
F
1
2
1
2
20 + 0.1Cb
0.05VDD
VDD – 0.25
0.7VDD
0.1VDD
VDD – 0.4
Min
-10
50
1
Typ
0
0
3
0.2VDD
0.3VDD
Max
100
300
0.4
10
10
VDD
VDD
Max
0.25
0.4
4.5
10
10
Units
MHz
μA
pF
ns
ns
V
V
V
V
V
V
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Units
SH3100
ns
ns
V
V
V
V
V