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PDF MAX14750 Data sheet ( Hoja de datos )
| Número de pieza | MAX14750 | |
| Descripción | Power-Management Solution | |
| Fabricantes | Maxim Integrated | |
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MAX14720/MAX14750
Power-Management Solution
General Description
The MAX14720/MAX14750 are compact power-management
solutions for space-constrained, battery-powered applications
where size and efficiency are critical. Both devices integrate
a power switch, a linear regulator, a buck regulator, and a
buck-boost regulator.
The MAX14720 is designed to be the primary power-
management device and is ideal for either non-rechargeable
battery (coin-cell, dual alkaline) applications or for
rechargeable solutions where the battery is removable
and charged separately. The device includes a button
monitor and sequencer.
The MAX14750 works well as a companion to a charger
or PMIC in rechargeable applications. It provides direct
pin control of each function and allows greater flexibility
for controlling sequencing.
The devices include two programmable micro-IQ, high-
efficiency switching converters: a buck-boost regulator
and a synchronous buck regulator. These regulators
feature a burst mode for increased efficiency during light-
load operation.
The low-dropout linear regulator has a programmable
output. It can also operate as a power switch that can
disconnect the quiescent load of system peripherals.
The devices also include a power switch with battery-
monitoring capability. The switch can isolate the battery
from all system loads to maximize battery life when not
operating. It is also used to isolate the battery-impedance
measurements. This switch can operate as a general-
purpose load switch as well.
The MAX14720 includes a programmable power controller
that allows the device to be configured either for use in
applications that require a true off state or for always-on
applications. This controller provides a delayed reset signal,
voltage sequencing, and customized button timing for on/off
control and recovery hard reset.
Both devices also include a multiplexer for monitoring the
power inputs and outputs of each function.
These devices are available in a 25-bump, 0.4mm pitch,
2.26mm x 2.14mm wafer-level package (WLP) and operate
over the -40°C to +85°C extended temperature range.
Benefits and Features
●● Extended System Battery Use Time
• Micro-IQ 250mW Buck-Boost Regulator
-- Input Voltage from 1.8V to 5.5V
-- Output Voltage Programmable from 2.5V to 5V
-- 1.1µA Quiescent Current
-- Programmable Current Limit
• Micro-IQ 200mA Buck Regulator
-- Input Voltage from 1.8V to 5.5V
-- Output Voltage Programmable from 1.0V to 2.0V
-- 0.9µA Quiescent Current
• Micro-IQ 100mA LDO
-- Input Voltage From 1.71V to 5.5V
-- Output Programmable From 0.9V to 4.0V
-- 0. 9µA Quiescent Current
-- Configurable as Load Switch
●● Extend Product Shelf-Life
• Battery Seal Mode (MAX14720)
-- 120nA Battery Current
• Power Switch On-Resistance
-- 250mΩ (max) at 2.7V
-- 500mΩ (max) at 1.8V
• Battery Impedance Detector
●● Easy-to-Implement System Control
• Configurable Power Mode and Reset Behavior
(MAX14720)
-- Push-Button Monitoring to Enable Ultra-Low
Power Shipping Mode
-- Disconnects All Loads From Battery and
Reduces Leakage to Less than 1µA
-- Power-On Reset (POR) Delay and Voltage
Sequencing
• Individual Enable Pins (MAX14750)
• Voltage Monitor Multiplexer
• I2C Control Interface
Applications
●● Wearable Medical Devices
●● Wearable Fitness Devices
●● Portable Medical Devices
Ordering Information appears at end of data sheet.
19-7685; Rev 2; 8/16
1 page  
MAX14720/MAX14750
Power-Management Solution
Electrical Characteristics (continued)
(VCC = VBIN = VLIN = VHVIN = VSWIN = 2.7V, TA = -40°C to +85°C, all registers in their default state, unless otherwise noted. Typical
values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Pulse Mode Switching
Period Ratio
TRATIO
fOSC/fSW, 128 steps
10 138
Short-Circuit Peak
Current Limit
ISHRT_BOOST
VHVOUT = GND.
0.4 1.1
1.9
A
Thermal-Shutdown
Threshold
TSHDN_BST
TJ rising
150 °C
Thermal-Shutdown
Hysteresis
TSHDN_HYST_BST
21 °C
Buck Converter (COUT = 10µF, L = 2.2µH, unless otherwise noted.)
Input Voltage Range
VBIN
Quiescent Supply
Current
IQ_BUCK
IBOUT = 0A
IBOUT = 0A, BIN UVLO enabled
IBOUT = 0A, BuckMd[1:0] = 01
Maximum Operative
Output Current
IMAXBOUT
1.8
0.8
1
250
5.5
1.6
2
4.8
V
µA
mA
mA
Output Voltage
Output Accuracy
Dropout Voltage
Line Regulation Error
Load Regulation Error
Line Transient
VBOUT
ACC_BOUT
VDROP_BUCK
VLINEREG_BUCK
VLOADREG_BUCK
VLINETRAN_BUCK
25mV step
VBIN = (VBOUT + 0.1V) or higher,
IBOUT = 1mA; average output
IBOUT = 0A
VBIN = from 2V to 5V,
VBOUT = 1.2V
BuckInteg = 1, IBOUT = 200mA
VBOUT = 1.2V, VBIN = VCC: 2.0V to
5V, 1µs rise time
1
-3
95
0.65
23
50
2
+3
120
V
%
mV
%/V
mV
mV
Load Transient
VLOADTRAN_BUCK
IBOUT = 0mA to 200mA, 200ns rise
time
70
mV
Oscillator Frequency
Passive Discharge
Pull-Down Resistance
fOSC_BK
RPDL_BK
1.78
5
2
10
2.25
16
MHz
kΩ
Active Discharge
Current
IACTDL_BK
5.5 17
33
mA
Time from enable to full current
capability; BuckFst = 0
60
ms
Turn-On Time
tON_BUCK
Time from enable to full current
capability; BuckFst = 1
30
ms
Startup Output Current
ISTUP_BK
BuckFst = 0
18 mA
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX14720/MAX14750
Power-Management Solution
Typical Operating Characteristics (continued)
(VCC = VBIN = VLIN = VHVIN = VSWIN = 2.7V, TA = +25°C, all registers in their default state, unless otherwise noted.)
IHVOUT
VHVOUT
BUCK-BOOST
TRANSIENT RESPONSE
1.85
VLOUT vs. LOAD
toc11
50mA/div
50mV/div
1.825
1.8
1.775
VCC = 2.7V, 3.7V
100µs/div
1.75
0
20 40 60 80 100
IB1OUT (mA)
LDO LOAD TRANSIENT toc12
ILOUT
50mA/div
VLOUT
100µs/div
200mV/div
LDO LINE TRANSIENT
(VLIN CHANGED FROM 2V to 3V)
toc13
LDO LINE TRANSIENT
(VLIN CHANGED FROM 1.75V to 2.75V, ILOUT = 10mA
VLIN
1V/div
VLIN
1V/div
VLOUT
100µs/div
20mV/div
VLOUT
100µs/div
200mV/div
POWER SWITCH ON-RESISTANCE
0.5 vs. VSWIN
ISWOUT = 200mA
0.4
toc15
0.3 TA = +85°C TA = +25°C
0.2 TA = -40°C
0.1
0
1.8 2.8 3.8 4.8 5.8
VSWIN (V)
BUCK SWITCHING FREQUENCY
2.5 vs. TEMPERATURE
IBOUT = 10mA
2.25 VCC = 2.7V
2
toc16
1.75 VCC = 3.7V
1.5
-40 -15 10 35 60 85
TEMPERATURE (°C)
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX14750.PDF ] | |
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