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MCP16251
Microchip MCP16251 Brugsanvisning
Her er Microchip MCP16251 (Ikke kategoriseret) brugervejledning. 32 sider på sprog Engelsk med en vægt på 1.7 Mb. Hvis du ikke kan finde svar på dit problem Spørg vores community.
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2013 - 2016 Microchip Technology Inc. DS20005173B-page 1
MCP16251/2
Features
• Up to 96% Typical Efficiency
• 650 mA Typical Peak Input Current Limit:
- IOUT > 100 mA @ 3.3V VOUT
, 1.2V VIN
- IOUT > 250 mA @ 3.3V VOUT
, 2.4V VIN
- IOUT > 225 mA @ 5.0V VOUT
, 3.3V VIN
• Low Device Quiescent Current:
- Output Quiescent Current: < 4 µA typical,
device is not switching (VOUT > VIN,
excluding feedback divider current)
- Input Sleep Current: 1 µA
- No Load Input Current: 14 µA typical
• Shutdown Current: 0.6 µA typical
• Low Start-Up Voltage: 0.82V, 1 mA load
• Low Operating Input Voltage: down to 0.35V
• Adjustable Output Voltage Range: 1.8V to 5.5V
• Maximum Input Voltage VOUT < 5.5V
• Automatic PFM/PWM Operation:
- PWM Operation: 500 kHz
- PFM Output Ripple: 150 mV typical
• Feedback Voltage: 1.23V
• Internal Synchronous Rectifier
• Internal Compensation
• Inrush Current Limiting and Internal Soft Start
(1.5 ms typical)
• Selectable, Logic Controlled, Shutdown States:
- True Load Disconnect Option (MCP16251)
- Input-to-Output Bypass Option (MCP16252)
• Anti-Ringing Control
• Overtemperature Protection
• Available Packages:
- SOT-23, 6-Lead
- TDFN, 2 x 3 x 0.8 mm, 8-Lead
Package Types
Applications
• One, Two and Three-Cell Alkaline and NiMH/NiCd
Portable Products
• Solar Cell Applications
• Personal Care and Medical Products
• Bias for Status LEDs
• Smartphones, MP3 Players, Digital Cameras
• Remote Controllers, Portable Instruments
• Wireless Sensors
• Bluetooth Headsets
• +3.3V to +5.0V Distributed Power Supply
General Description
The MCP16251/2 is a compact, high-efficiency, fixed
frequency, synchronous step-up DC-DC converter.
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, 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 external components.
MCP16251/2 operates and consumes less than 14 µA
from battery after start-up, while operating at no load
(VOUT = 3.3V, VIN = 1.5V). The devices provide a true
disconnect from input to output (MCP16251) or an
input-to-output bypass (MCP16252), while in shutdown
(EN = GND). Both shutdown options consume less
than 0.6 µA from battery.
Output voltage is set by a small external resistor
divider. Two package options, SOT-23, 6-lead and
TDFN, 2 x 3 x 0.8 mm, 8-lead are available.
MCP16251/2
2x3x0.8 TDFN*
PGND
SGND
EN
VOUTS
VOUTP
1
2
3
4
8
7
6
5 SW
VIN
VFB
EP
9
4
1
2
3
6VIN
VFB
SW
GND
EN
5VOUT
MCP16251/2
6-Lead SOT-23
* Includes Exposed Thermal Pad (EP); see Table 3-1.
Low Quiescent Current, PFM/PWM Synchronous Boost Regulator
with True Output Disconnect or Input/Output Bypass Option
Problemløsning Microchip MCP16251
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Specifikationer
| Mærke: | Microchip |
| Kategori: | Ikke kategoriseret |
| Model: | MCP16251 |