TC646B/TC648B/TC649B
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
Supply Voltage (VDD) .......................................................6.0V
Input Voltage, Any Pin................(GND - 0.3V) to (VDD +0.3V)
Operating Temperature Range ....................- 40°C to +125°C
Maximum Junction Temperature, TJ ........................... +150°C
ESD Protection on all pins ........................................... > 3 kV
† Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
PIN FUNCTION TABLE
Name
VIN
CF
VAS
GND
SENSE/NC
FAULT/OTF
VOUT
VDD
Function
Analog Input
Analog Output
Analog Input
Ground
Analog Input.
No Connect (NC) for TC648B
Digital (Open-Drain) Output
OTF for TC648B
Digital Output
Power Supply Input
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are specified for -40°C < TA < +85°C, VDD = 3.0V to 5.5V.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Supply Voltage
Supply Current, Operating
VDD
3.0
—
5.5
IDD
—
200
400
Supply Current, Shutdown Mode
IDD(SHDN)
—
30
—
VOUT Output
Sink Current at VOUT Output
Source Current at VOUT Output
VIN, VAS Inputs
Input Voltage at VIN for 100% PWM
Duty Cycle
IOL
IOH
VC(MAX)
1.0
5.0
2.45
—
—
2.60
Over-Temperature Indication
Threshold
VOTF
VC(MAX) +
20 mV
Over-Temperature Indication
VOTF-HYS
80
Threshold Hysteresis
VC(MAX) - VC(MIN)
VC(SPAN)
1.3
1.4
Hysteresis on Auto-Shutdown
VHAS
—
70
Comparator
Auto-Shutdown Threshold
Voltage Applied to VIN to Ensure
Shutdown Mode
VAS
VC(MAX) -
—
VC(SPAN)
VSHDN
—
—
Voltage Applied to VIN to Release
Shutdown Mode
VREL
VDD x 0.19
—
Hysteresis on VSHDN, VREL
VHYST
—
0.03 X
VDD
VIN, VAS Input Leakage
IIN
- 1.0
—
Note 1: Ensured by design, tested during characterization.
2: For VDD < 3.7V, tSTARTUP and tMP timers are typically 13/f.
—
—
2.75
1.5
—
VC(MAX)
VDD x 0.13
—
—
+1.0
V
µA Pins 6, 7 Open,
CF = 1 µF, VIN = VC(MAX)
µA Pins 6, 7 Open,
CF = 1 µF, VIN = 0.35V
mA VOL = 10% of VDD
mA VOH = 80% of VDD
V
V For TC646B and TC648B
mV For TC646B and TC648B
V
mV
V
V
V VDD = 5V
V
µA Note 1
2003 Microchip Technology Inc.
DS21755B-page 3