MAX1901EAI+ Maxim Integrated Products, MAX1901EAI+ Datasheet - Page 10

• Manufacturer Part Number: MAX1901EAI+
• Description: IC CNTRLR PWR SPLY LN 28-SSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1901EAI+

• Applications: Controller, Notebook Computers
• Voltage - Input: 4.2 ~ 30 V
• Number Of Outputs: 4
• Voltage - Output: 2.5 ~ 5 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Output Voltage: 3.3 V, 5 V, 2.5 V to 5.5 V
• Output Current: 5 A
• Input Voltage: 4.2 V to 30 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

500kHz Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
10
QSOP
______________________________________________________________________________________
15
16
17
18
19
20
21
22
23
24
25
26
27
28
—
PIN
6, 16, 25, 32
QFN
13
14
15
17
18
19
20
21
22
23
24
26
27
28
RUN/ON3
NAME
PGND
SHDN
BST5
BST3
SEQ
DH5
DH3
N.C.
DL5
DL3
LX5
LX3
V+
V L
Pin-strap input that selects the SMPS power-up sequence:
Gate-Drive Output for the 5V, High-Side N-Channel Switch. DH5 is a floating driver
output that swings from LX5 to BST5, riding on the LX5 switching node voltage.
Switching-Node (Inductor) Connection. Can swing 2V below ground without hazard.
Boost Capacitor Connection for High-Side Gate Drive (0.1µF)
Gate-Drive Output for the Low-Side Synchronous-Rectifier MOSFET. Swings 0 to V
Power Ground
5V Internal Linear-Regulator Output. V
After the 5V SMPS output has reached 4.5V (typ), V
output voltage through CSL5 for bootstrapping. Bypass to GND with 4.7µF. V
supplies up to 25mA for external loads.
Battery Voltage Input, 4.2V to 30V. Bypass V+ to PGND close to the IC with a 0.22µF
capacitor. Connects to a linear regulator that powers V
Shutdown Control Input, Active Low. Logic threshold is set at approximately 1V. For
automatic startup, connect SHDN to V+ through a 220kΩ resistor and bypass SHDN to
GND with a 0.01µF capacitor.
Gate-Drive Output for the Low-Side Synchronous-Rectifier MOSFET. Swings 0 to V L .
Boost Capacitor Connection for High-Side Gate Drive (0.1µF)
Switching-Node (Inductor) Connection. Can swing 2V below ground without hazard.
Gate-Drive Output for the 3.3V, High-Side N-Channel Switch. DH3 is a floating driver
output that swings from LX3 to BST3, riding on the LX3 switching-node voltage.
ON/OFF Control Input. See the Power-Up Sequencing and ON/ OFF Controls section.
No Connection
SEQ = GND: 5V before 3.3V, RESET output determined by both outputs
SEQ = REF: Separate ON3/ON5 controls, RESET output determined by 3.3V
output
SEQ = V
L
: 3.3V before 5V, RESET output determined by both outputs
Pin Description (continued)
FUNCTION
L
is also the supply-voltage rail for the chip.
L
automatically switches to the
L
.
L
L
.