MCP1641X
Low IQ Boost Converter with Programmable Low Battery, UVLO and
Automatic Input-to-Output Bypass Operation
Features
Description
• Input Voltage Range: 0.8V (after Start-up)
to 5.25V
The MCP1641X Step-up DC-DC Converters family
provides an automatic input-to-output voltage bypass
operation, which helps optimize battery utilization and
achieve high efficiency, while the nominal voltage of
fresh batteries remains in the same range with the con-
verter’s output value. The MCP1641X can be powered
by either single-cell, two-cell alkaline/NiMH batteries or
single-cell Li-Ion/Li-Polymer batteries.
• Low Device Quiescent Current: 5 µA (typical),
PFM Mode (not switching)
• Up to 96% Efficiency
• 1A Typical Inductor Peak Current Limit:
- IOUT > 170 mA at 2V VOUT, 1.2V VIN
- IOUT > 200 mA at 3.3V VOUT, 1.5V VIN
- IOUT > 600 mA at 5.0V VOUT, 3.6V VIN
• Adjustable Output Voltage Range
• Automatic Input-to-Output Bypass Operation
• Selectable Switching Mode:
A
low-voltage designed architecture allows the
regulator to start up without high inrush current or
output voltage overshoot from a low input voltage. The
start-up voltage is easily programmed by a resistive
divider connected to the UVLO pin. If the resistive
divider is not used, the default start-up voltage is 0.85V.
The 0.8V built-in UVLOSTOP helps prevent deep dis-
charge of the alkaline battery, which can cause battery
leakage. An open-drain Low Battery Output (LBO) pin
warns the user to replace the battery if the input voltage
ramps down to the programmed UVLOSTART value.
- PWM operation: 500 kHz (MCP16412/4/6/8)
- Automatic PFM/PWM operation
(MCP16411/3/5/7)
• Programmable Undervoltage Lockout (UVLO)
• Programmable Low Battery Output (LBO)
• Selectable Status Indicator:
The MCP1641X family introduces an additional safety
- Power Good and Die Overtemperature
output (MCP16411/2/3/4)
feature to a low-voltage boost converter: Over-
temperature Output. Devices, such as personal care
products, Bluetooth headsets or toys, will benefit from
the combined Power Good and Die Overtemperature
(PGT) output, which flags a warning signal when the out-
- Power Good output (MCP16415/6/7/8)
• Internal Synchronous Rectifier
• Internal Compensation
put voltage level drops within 10% or the die temperature
(1)
• Inrush Current Limiting and Internal Soft Start
• Low Noise, Anti-Ringing Control
• Thermal Shutdown
exceeds the +75°C (typical).
Both functions are
implemented in the MCP16411/2/3/4 devices (on the
same pin, PGT), while the MCP16415/6/7/8 devices
have only the Power Good option.
• Selectable Shutdown States:
- Output discharge option (MCP16411/2/5/6)
Note 1: Factory programmable from +55C to
+85C, at +10C increments, by customer
request.
- Input-to-output bypass option
(MCP16413/4/7/8)
• Shutdown Current: 2.3 µA (typical)
• Available Packages:
Package Types
MCP1641X
10-Lead MSOP
MCP1641X
3x3 TDFN*
- 10-Lead MSOP
- 10-Lead 3 mm x 3 mm TDFN
EN
1
2
3
4
5
10
9
UVLO
EN
VIN
UVLO
LBO
1
2
3
4
5
10
9
VIN
LBO
PGT**
VFB
Applications
SGND
EP
11
SGND
PGND
8
PGT**
VFB
8
PGND
SW
• Personal and Health Care Products
• Single-Cell or Two-Cell Powered IoT Devices
• Bluetooth® Headsets
7
7
VOUT
6
VOUT
6
SW
*Includes Exposed Thermal Pad (EP), see Table 4-1.
**See Table 3-1 for device options – PGT or PG pin.
• Remote Controllers, Portable Instruments
• Wireless Sensors, Data Loggers
2020-2021 Microchip Technology Inc. and its subsidiaries
DS20006394D-page 1