MAX8819CETI+ Maxim Integrated Products, MAX8819CETI+ Datasheet - Page 26

• Manufacturer Part Number: MAX8819CETI+
• Description: IC PMIC W/INT CHARGER 28TQFN-EP
• Manufacturer: Maxim Integrated Products
• Type: PMIC with Integrated Chargersr

Specifications of MAX8819CETI+

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 4.1 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Output Voltage Range: 1 V to 4 V
• Input Voltage Range: 4.1 V to 5.5 V
• Input Current: 1.33 mA
• Power Dissipation: 2285.7 mW
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
4) EN4 to turn on the display’s backlight.
5) CEN is asserted by the μP to start a charge cycle.
6) The external supply is removed from DC and V
7) System is turned off by deasserting EN123, EN4,
The step-up converter (REG4) operates by regulating
the voltage at FB4 to 0.5V. REG4 operates from the
system voltage (V
4.35V (MAX8819A/MAX8819C) or 5.3V (MAX8819B). The
Figure 8. Dimming Control Timing Diagram
Table 4. REG4 Recommended Inductors
Table 5. REG4 Recommended Diodes
26
TOKO
FDK
Central Semiconductor
NXP
ON Semiconductor
MANUFACTURER
falls. The regulators remain enabled because EN123
and EN4 are asserted, but the battery charging cur-
rent drops to zero even though CEN is still asserted.
CHG goes high-impedance.
and CEN. OUT1, OUT2, and OUT3 power down in
the opposite order of power-up. RST1 goes low to
reset the μP.
STEP
EN4
I
LED
MANUFACTURER
______________________________________________________________________________________
> 100μs
t
SHUTDOWN
HI_INIT
t
SOFT-START
0
SYS
); this voltage can vary from 2.6V to
Step-Up Converter (REG4)
DB3018C
DE2812C
MIP3226
SERIES
FULL
PART NUMBER
PMEG3005EB
CMDSH05-4
1
CMHSH5-4
MBR0530L
31/32
2
30/32 29/32
INDUCTANCE
3
(µH)
500ns TO 500μs
10
10
10
4
28/32
CONTINUOUS
CURRENT
5
27/32
(mA)
500
500
500
500
SYS
t
LO
ESR (mΩ)
290
240
160
6/32
1MHz switching frequency allows for tiny external com-
ponents. The step-up converter control scheme opti-
mizes the efficiency while achieving low EMI and low
input ripple.
If the step-up converter (REG4) is not needed, disable
REG4 by grounding EN4, LX4, PG4, and OVP4. COMP4
can be unconnected.
Figure 1 shows that REG4 is configured as a white light
emitting diodes (WLED) driver, typically used to drive
up to six devices with an output voltage up to 24V. The
full-scale current is set by resistor R1, according to the
following relationship:
> 500ns
28
FORWARD VOLTAGE
t
HI
5/32
29
4/32
I
I
FS
FS
RATING (mA)
(mV)
470
510
500
430
CURRENT
30
3/32
=
<
0 5
580
630
900
V
.
FB
R
31
1
V
2/32
4
/
,
16
REG4 WLED Driver Configuration
where V
32
1/32
Ω
=
BREAKDOWN
33
30 9
FULL
VOLTAGE
FB
.
3.0 x 2.8 x 1.2 = (10.8mm)
3.2 x 3.2 x 1.8 = (18.4mm)
3.2 x 2.6 x 1 = (8.32mm)
mA
4
(V)
40
40
30
30
31/32
DIMENSIONS (mm)
=
0 5
.
2ms (typ)
V no
t
SHDN
min
PACKAGE
SOD-323
SOD-123
SOD-523
SOD-123
SHUTDOWN
ally
3
3
3