Instrukcja obsługi Microchip MCP16251

Microchip nieskategoryzowany MCP16251

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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
MCP16251/2
DS20005173B-page 2 2013 - 2016 Microchip Technology Inc.
Typical Application
VIN
PGND
VFB
SW
VIN
3.0V to 4.2V
VOUT
5.0V / 200 mA
COUT
10 µF
CIN
4.7 µF
L
4.7 µH
VOUTS
+
-
3.09 M
1 M
VOUTP
SGND
Li-Ion
EN
VIN
GND
VFB
SW
VIN
0.9V to 1.7V
VOUT
3.3V / 75 mA
COUT
10 µF
CIN
4.7 µF
L
4.7 µH
VOUT
+
-
1.69 M
1 M
Alkaline
EN
50
55
60
65
70
75
80
85
90
95
100
0.1 1 10 100 1000
Efficiency (%)
IOUT (mA)
VOUT = 3.3V
VIN = 1.5V V
IN
= 2.4V
VIN = 3.0V
RTOP
RBOT
RTOP
RBOT
2013 - 2016 Microchip Technology Inc. DS20005173B-page 3
MCP16251/2
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
EN, VFB, VIN, VSW, VOUT - GND .........................+6.5V
EN, VFB .........< maximum VOUT or VIN > - (GND 0.3V)
Output Short-Circuit Current ...................... Continuous
Output Current Bypass Mode...........................400 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 ................................................................ 400V
† 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 = 1.5V, COUT = CIN = 10 µF, L = 4.7 µH, VOUT = 3.3V,
IOUT = 0 mA, T
A = +25°C. Boldface specifications apply over the T
A range of -40°C to +85°C.
Parameters Sym. Min. Typ. Max. Units Conditions
Input Characteristics
Minimum Start-Up Voltage VIN — — V0.82 Note 1
Minimum Input Voltage
After Start-Up VIN — — V0.35 Note 1
Output Voltage Adjust
Range VOUT 1.8 —5.5 VVOUT VIN
Note 2
Maximum Output Current IOUT 100
150 —
mA
1.2V VIN, 2.0V VOUT
125 — 1.5V VIN, 3.3V VOUT
225 — 3.3V VIN, 5.0V VOUT
Feedback Voltage VFB 1.1931 1.23 1.2669 V
Feedback Input
Bias Current IVFB — —10 nA
VOUT Quiescent Current IQOUT — 84.0 µA
IOUT = 0 mA, device is not
switching, EN = VIN = 4.0V,
VOUT = 5.0V, does not
include feedback divider
current (Note 3)
VIN Sleep Current I QIN — 1.0 2.3 µA IOUT = 0 = VmA, EN IN
( ) ( )
Note 3 , Note 5
No Load Input Current IIN0 — 14 25 µA IOUT = 0 mA,
device is switching
Quiescent Current –
Shutdown IQSHDN — —0.6 µA
VOUT = = EN GND;
includes N-Channel and
P-Channel Switch Leakage
Note 1: 3.3 k resistive load, 3.3VOUT (1 mA).
2: For VIN > VOUT
, VOUT will not remain in regulation.
3: IQOUT is measured at VOUT, VOUT is supplied externally for VOUT > VIN (device is not switching), IQIN is
measured at VIN pin during Sleep period, no load.
4: 220 resistive load, 3.3VOUT (15 mA).
5: Determined by characterization, not production tested.

Specyfikacje produktu

Marka: Microchip
Kategoria: nieskategoryzowany
Model: MCP16251

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