MAX8594ETG+T Maxim Integrated Products, MAX8594ETG+T Datasheet - Page 12

• Manufacturer Part Number: MAX8594ETG+T
• Description: IC PMIC W/DC-DC SUP 24-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8594ETG+T

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 3.1 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5-Output PMICs with DC-DC Core Supply for
Low-Cost PDAs
12
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PIN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
NAME
SDIG
DBO
ENM
GND
LBO
ENL
DBI
REF
LFB
LXL
LBI
RS
CV
IN
3.3V, 500mA LDO Output for Secure-Digital Card Slot. SDIG has reverse current protection so SDIG
can be biased when no power is present at IN. SDIG output turns off when V
threshold, ENSD goes low, or MAIN is out of regulation. When SDIG turns off, the output is discharged
at a rate depending on the load and the internal feedback resistors (typically 1.3MΩ).
Input Voltage to the MAX8594/MAX8594A. Bypass IN to GND with a 1µF ceramic capacitor.
Reset Output. RS is an active-low, open-drain output that goes high impedance 20ms (typ) after
COR1 is in regulation. COR1 does not turn on until MAIN is in regulation. If MAIN falls out of
regulation, COR1 turns off and RS goes low. If MAIN is still in regulation, then RS goes low when V
is below the DBI threshold. RS goes low when ENC1 is low.
Low-Battery Detector Open-Drain Output. LBO is an active-low, open-drain output that goes high
impedance when V
below the LBI threshold.
Dead-Battery Detector Open-Drain Output. When V
go low, all outputs shut down, and the MAX8594/MAX8594A enter the lowest possible quiescent-
current state. Once this occurs, MAIN does not turn back on until both V
and ENM = high. DBO is an active-low, open-drain output that goes high impedance when V
exceeds the DBI threshold.
Dead-Battery Detector. DBI remains active at all times. If DBI = IN, the DBI threshold is 3.0V when IN
is falling and 3.3V when rising. The DBI threshold can also be adjusted to other values by connecting
DBI to a resistor voltage-divider. Also see the DBO description.
Low-Battery Detector. If LBI = IN, the LBI threshold is 3.33V when IN is falling and 3.7V when rising.
The LBI threshold can also be adjusted to other values by connecting LBI to a resistor voltage-
divider. Also see the LBO description.
S el ects 1V or 1.3V C OR1 Outp ut V ol tag e for M AX 8594, and 1.3V or 1.8V C O R1 for M AX 8594A. D r i ve C V
hi g h or connect to IN for a 1.3V C OR1 outp ut ( 1.8V C OR1 for M AX 8594A) . D r i ve C V l ow or connect to GN D
for a 1V C OR1 outp ut ( 1.3V C OR1 for M AX 8594A) .
Enable Input for MAIN. No other outputs turn on until MAIN is in regulation. If MAIN is pulled out of
regulation, all other outputs turn off and RS goes low. MAIN cannot be activated when V
the DBI threshold.
Ground
1.25V 1% Reference. Bypass REF with a 0.1µF capacitor to GND. REF is enabled when V
than the DBI threshold. REF is off when V
LCD Feedback Input. Connect LFB to a resistor-divider network between the LCD output and GND.
The feedback threshold is 1.25V. LCD turns off when V
low, or when MAIN is out of regulation. When off, the LCD output is discharged at a rate depending
on the load and the external feedback resistors (typically 2.4MΩ).
Enable Input for LCD (Boost Regulator). Drive ENL high to activate the LCD boost. Drive ENL low to
shut down the LCD output. The LCD converter cannot be activated when V
threshold or before MAIN is in regulation.
LCD Boost Switch. Connect LXL to a boost inductor and Schottky diode. See Figure 1.
IN
is greater than both the DBI and LBI thresholds. LBO goes low when V
IN
is below the DBI threshold.
FUNCTION
IN
is below the DBI threshold, both DBO and LBO
IN
is below the DBI threshold, when ENL goes
IN
exceeds the DBI threshold
Pin Description
IN
IN
is below the DBI
is below the DBI
IN
IN
is below
is greater
IN
IN
falls
IN