http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1642B Datasheet

1 MHz Low-Voltage Start-Up Synchronous Boost Regulator

No Preview Available !

MCP1642B pdf
MCP1642B/D
1.8A Input Current Switch, 1 MHz Low-Voltage Start-Up
Synchronous Boost Regulator
Features
• Up to 96% Typical Efficiency
• 1.8A Typical Peak Input Current Limit:
- IOUT > 175 mA @ 1.2V VIN, 3.3V VOUT
- IOUT > 600 mA @ 2.4V VIN, 3.3V VOUT
- IOUT > 800 mA @ 3.3V VIN, 5.0V VOUT
- IOUT > 1A @ VIN > 3.6V, 5.0V VOUT
• Low Start-Up Voltage: 0.65V, typical 3.3V VOUT
@ 1 mA
• Low Operating Input Voltage: 0.35V, typical 3.3V
VOUT @ 1 mA
• Output Voltage Range:
- Reference Voltage, VFB = 1.21V
- 1.8V to 5.5V for the adjustable device option
- 1.8V, 3.0V, 3.3V and 5.0V for fixed VOUT
options
• Maximum Input Voltage VOUT < 5.5V
• PWM Operation: 1 MHz
- Low Noise, Anti-Ringing Control
• Power Good Open-Drain Output
• Internal Synchronous Rectifier
• Internal Compensation
• Inrush Current Limiting and Internal Soft-Start
• Selectable, Logic-Controlled Shutdown States:
- True Load Disconnect Option (MCP1642B)
- Input-to-Output Bypass Option (MCP1642D)
• Shutdown Current (All States): 1 µA
• Overtemperature Protection
• Available Packages:
- 8-Lead MSOP
- 8-Lead 2x3 DFN
Applications
• One, Two and Three-Cell Alkaline, Lithium
Ultimate and NiMH/NiCd Portable Products
• Single-Cell Li-Ion to 5V Converters
• PIC® MCU Power
• USB Emergency Backup Charger from Batteries
• Personal Medical Products
• Wireless Sensors
• Hand-Held Instruments
• GPS Receivers
• +3.3V to +5.0V Distributed Power Supply
General Description
The MCP1642B/D devices are compact,
high-efficiency, fixed-frequency, synchronous step-up
DC-DC converters. This family of devices provides an
easy-to-use power supply solution for applications
powered by either one-cell, two-cell, or three-cell
alkaline, Ultimate Lithium, NiCd, NiMH, one-cell Li-Ion
or Li-Polymer batteries.
Low-voltage technology allows the regulator to start-up
without high inrush current or output voltage overshoot
from a low voltage input. High efficiency is
accomplished by integrating the low-resistance
N-Channel Boost switch and synchronous P-Channel
switch. All compensation and protection circuitry are
integrated to minimize the number of external
components. An open-drain Power Good output is
provided to indicate when the output voltage is within
10% of regulation and facilitates the interface with an
MCU. For standby applications, MCP1642B provides a
“true output disconnect” from input to output while in
shutdown (EN = GND). An additional device option
(MCP1642D) is available and connects “input to output
bypass” while in shutdown. Both options consume less
than 1 µA of input current.
For the adjustable (ADJ) device options, the output
voltage is set by a small external resistor divider. Fixed
VOUT device options do not require external divider
resistors. Two package options, 8-lead MSOP and 8-
lead 2x3 DFN, are available.
Package Types
MCP1642B/D-xx
MSOP
MCP1642B/D-xx
2x3 DFN*
EN 1
NC 2
PG 3
VOUT 4
8 VIN
EN 1
8 VIN
7 SGND NC 2 EP 7 SGND
6 PGND PG 3 9 6 PGND
5 SW VOUT 4
5 SW
MCP1642B/D-ADJ
MSOP
MCP1642B/D-ADJ
2x3 DFN*
EN 1
VFB 2
PG 3
VOUT 4
8 VIN
EN 1
8 VIN
7 SGND VFB 2 EP 7 SGND
6 PGND PG 3 9 6 PGND
5 SW VOUT 4
5 SW
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2014 Microchip Technology Inc.
DS20005253A-page 1



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1642B Datasheet

1 MHz Low-Voltage Start-Up Synchronous Boost Regulator

No Preview Available !

MCP1642B pdf
MCP1642B/D
Typical Application
L1
4.7 µH
CIN
4.7...10 µF
VIN= 0.9 to 1.6V
+
NC
-
ON
OFF
SW
VOUT
VIN
MCP1642B-33
PG
EN
GND
VOUT
3.3V
COUT
4.7...10 µF
L
4.7 µH
VIN= 1.8 to 3.2V
+
CIN
4.7...10 µF
SW
VOUT
VIN
MCP1642D-ADJ
VFB
EN
-
ON
+ OFF
From PIC® MCU I/O
PG
GND
-
RTOP
976 k
RBOT
309 k
VOUT
5.0V
RPG
1 M
COUT
4.7...10 µF
To PIC MCU I/O
100
90
80 VIN = 1.2V, VOUT = 3.3V
70
60 VIN = 2.5V, VOUT = 5.0V
50
40
30
20
10
0
1 10 100
IOUT (mA)
1000
DS20005253A-page 2
2014 Microchip Technology Inc.



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1642B Datasheet

1 MHz Low-Voltage Start-Up Synchronous Boost Regulator

No Preview Available !

MCP1642B pdf
MCP1642B/D
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
EN, FB, VIN, VSW, VOUT – GND .......................... +6.5V
EN, FB ......<maximum of VOUT or VIN > (GND – 0.3V)
Output Short-Circuit Current ...................... Continuous
Output Current Bypass Mode........................... 800 mA
Power Dissipation ............................ Internally Limited
Storage Temperature ..........................-65°C to +150°C
Ambient Temp. with Power Applied.......-40°C to +85°C
Operating Junction Temperature.........-40°C to +125°C
ESD Protection On All Pins:
HBM........................................................ 4 kV
MM......................................................... 300V
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 sections of this
specification is not intended. Exposure to maximum
rating conditions for extended periods may affect
device reliability.
DC CHARACTERISTICS
Electrical Characteristics: Unless otherwise indicated, VIN = 1.2V, COUT = CIN = 10 µF, L = 4.7 µH, VOUT = 3.3V,
IOUT = 15 mA, TA = +25°C, MCP1642B/D-ADJ. Boldface specifications apply over the TA range of -40°C to +85°C.
Parameters
Sym.
Min. Typ. Max. Units
Conditions
Input Characteristics
Minimum Start-Up Voltage
VIN
— 0.65 0.8
— 0.9
1.8
V Note 1
V MCP1642B/D-50, Note 1
Minimum Input Voltage
After Start-Up
VIN
— 0.35 —
V Note 1, Note 5
— 0.5
V Note 1, Note 5, MCP1642B/D-50
Output Voltage Adjust.
Range
(MCP1642B/D-ADJ)
VOUT
1.8
5.5
V VOUT VIN (MCP1642B/D-ADJ);
Note 2
Output Voltage
(MCP1642B/D-XX)
VOUT
— 1.8
V VIN < 1.8V, MCP1642B/D-18,
Note 2
— 3.0
V VIN < 3.0V, MCP1642B/D-30,
Note 2
— 3.3
V VIN < 3.3V, MCP1642B/D-33,
Note 2
— 5.0
V VIN < 5.0V, MCP1642B/D-50,
Note 2
Maximum Output Current
Feedback Voltage
Feedback Input
Bias Current
IOUT
VFB
IVFB
1.173
175
300
800
1.21
1.0
1.247
mA 1.2V VIN, 1.8V VOUT, Note 5
mA 1.5V VIN, 3.3V VOUT, Note 5
mA 3.3V VIN, 5.0V VOUT, Note 5
V
nA Note 5
Note 1: Resistive load, 1 mA.
2: For VIN > VOUT, VOUT will not remain in regulation.
3: IQPWM is measured from VOUT; VOUT is externally supplied with a voltage higher than the nominal 3.3V
output (device is not switching), no load. VIN quiescent current will vary with boost ratio. VIN quiescent
current can be estimated by: (IQPWM * (VOUT/VIN)).
4: 220resistive load, 3.3V VOUT (15 mA).
5: Determined by characterization, not production tested.
2014 Microchip Technology Inc.
DS20005253A-page 3




Part Number MCP1642B
Description 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator
Maker Microchip
Total Page 30 Pages
PDF Download
MCP1642B pdf
Download PDF File
MCP1642B pdf
View for Mobile






Related Datasheet

1 MCP1642B 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator Microchip
Microchip
MCP1642B pdf
2 MCP1642D 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator Microchip
Microchip
MCP1642D pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components