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MCP1603T-120I/MC Datenblatt(PDF) 6 Page - Microchip Technology

Teilenummer MCP1603T-120I/MC
Bauteilbeschribung  2.0 MHz, 500 mA Synchronous Buck Regulator
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1603T-120I/MC Datenblatt(HTML) 6 Page - Microchip Technology

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MCP1603/B/L
DS22042B-page 6
 2007-2012 Microchip Technology Inc.
Output Characteristics
Adjustable Output Voltage Range
VOUT
0.8
4.5
V
Note 2
Reference Feedback Voltage
VFB
—0.8
V
Reference Feedback Voltage
Tolerance
-3.0
+3.0
%
TA = -40°C to +25°C
-2.5
+2.5
%
TA = +25°C to +85°C
Feedback Input Bias Current
IVFB
—0.1
nA
Output Voltage Tolerance Fixed
VOUT
-3.0%
VR
+3.0%
%
TA = -40°C to +25°C, Note 3
VOUT
-2.5
VR
+2.5
%
TA = +25°C to +85°C, Note 3
Line Regulation
VLINE-REG
—0.3
%/V
VIN = VR + 1V to 5.5V,
IOUT = 100 mA
Load Regulation
VLOAD-REG
—0.35
%
VIN =VR +1.5V,
ILOAD =100 mA to 500mA
Internal Oscillator Frequency
FOSC
1.5
2.0
2.8
MHz
Start Up Time
TSS
—0.6
ms
TR = 10% to 90%
RDSon P-Channel
RDSon-P
—500
m
IP =100 mA
RDSon N-Channel
RDSon-N
—500
m
IN = 100 mA
LX Pin Leakage Current
ILX
-1.0
±0.1
1.0
µA
SHDN =0V, VIN =5.5V,
LX =0V, LX =5.5V
Positive Current Limit Threshold
+ILX(MAX)
—860
mA
Note 6
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits are specified for: VIN + 2.7V to 5.5V
Parameters
Sym
Min
Typ
Max
Units
Conditions
Temperature Ranges
Operating Junction Temperature Range
TJ
-40
+125
°C
Steady State
Storage Temperature Range
TA
-65
+150
°C
Maximum Junction Temperature
TJ
+150
°C
Transient
Package Thermal Resistances
Thermal Resistance, 5L-TSOT
JA
207.4
°C/W
Typical 4-layer Board with
Internal Ground Plane
Thermal Resistance, 8L-2x3 DFN
JA
68
°C/W
Typical 4-layer Board with
Internal Ground Plane and
2-Vias in Thermal Pad
DC CHARACTERISTICS (CONTINUED)
Electrical Characteristics: Unless otherwise indicated, MCP1603/L, VIN = SHDN = 3.6V, COUT = CIN = 4.7 µF,
L = 4.7 µH, VOUT(ADJ) = 1.8V, IOUT =100 mA, TA = +25°C. Boldface specifications apply over the TA range of -40°C
to +85°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Note 1:
The input voltage should be greater then the output voltage plus headroom voltage; higher load currents
increase the input voltage required for regulation. MCP1603B device requires a minimum load for
regulation. See Section 2.0, Typical Performance Curves for typical operating voltage ranges.
2:
Reference Feedback Voltage Tolerance applies to adjustable output voltage setting.
3:
VR is the output voltage setting.
4:
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
temperature and the thermal resistance from junction to air (i.e. TA, TJ, JA). Exceeding the maximum
allowable power dissipation causes the device to initiate thermal shutdown.
5:
The internal MOSFET switches have an integral diode from the LX pin to the VIN pin, and from the LX pin
to the GND pin. In cases where these diodes are forward-biased, the package power dissipation limits
must be adhered to. Thermal protection is not able to limit the junction temperature for these cases.
6:
The current limit threshold is a cycle-by-cycle peak current limit.


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