MAX17017GTM+ Maxim Integrated Products, MAX17017GTM+ Datasheet - Page 15

• Manufacturer Part Number: MAX17017GTM+
• Description: IC PWR SUPPLY CONTROLLER 48TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX17017GTM+

• Applications: Power Supply Controller
• Voltage - Input: 5.5 ~ 28 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFN Exposed Pad
• Input Voltage: 5.5 V to 24 V
• Operating Temperature Range: - 40 C to + 105 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 300 uA
• Supply Voltage Range: 3V To 5V, 5.5V To 28V
• Digital Ic Case Style: TQFN
• No. Of Pins: 48
• Termination Type: SMD
• No. Of Channels: 4
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

31, 32,
PIN
17
18
19
20
21
22
23
24
25
26
27
28
29
30
33
34
35
UP/DN
NAME
AGND
CSNA
POKA
POKB
FREQ
CSPA
BSTA
BSTB
DHA
V
REF
FBA
LXA
DLA
LXB
INA
CC
______________________________________________________________________________________
5V Analog Bias Supply. V
fault comparators, etc.) and control logic. Connect V
and bypass to analog ground using a 1μF or greater ceramic capacitor.
Input to the Circuit in Reg A in Boost Mode. Connect INA to the input in step-up mode (UP/DN = GND) and
connect INA to LDO5 in step-down mode (UP/DN = V
Converter Configuration Selection Input for Regulator A. When UP/DN is pulled high (UP/DN = V
regulator A operates as a step-down converter (Figure 1). When UP/DN is pulled low (UP/DN = GND),
regulator A operates as a step-up converter.
Trilevel Oscillator Frequency Selection Input.
FREQ = V
FREQ = REF: RegA = 375kHz, RegB = 750kHz, RegC = 375kHz
FREQ = GND: RegA = 500kHz, RegB = 1MHz, RegC = 500kHz
1.25V Reference-Voltage Output. Bypass REF to analog ground with a 0.1μF ceramic capacitor. The
reference sources up to 50μA for external loads. Loading REF degrades output voltage accuracy according
to the REF load-regulation error. The reference shuts down when the system pulls SHDN low in buck mode
(UP/DN = GND) or when the system pulls ONA low in boost mode (UP/DN = V
Analog Ground
N eg ati ve C ur r ent- S ense Inp ut for the M ai n S w i tchi ng Reg ul ator . C onnect to the neg ati ve ter m i nal of the cur r ent-
sense r esi stor . D ue to the C S N A b i as cur r ent r eq ui r em ents, l i m i t the ser i es i m p ed ance to l ess than 10Ω.
P osi ti ve C ur r ent- S ense Inp ut for the M ai n S w i tchi ng Reg ul ator . C onnect to the p osi ti ve ter m i nal of the cur r ent-
sense r esi stor . D ue to the C S P A b i as cur r ent r eq ui r em ents, l i m i t the ser i es i m p ed ance to l ess than 10Ω.
Feedback Input for the Main Switching Regulator. FBA regulates to 1.0V.
Open-Drain Power-Good Output for the Main Switching Regulator. POKA is low if FBA is more than 12% (typ)
above or below the nominal 1.0V feedback regulation point. POKA is held low during soft-start and in
shutdown. POKA becomes high impedance when FBA is in regulation.
High-Side Gate-Driver Output for the Main Switching Regulator. DHA swings from LXA to BSTA.
Inductor Connection of Converter A. Connect LXA to the switched side of the inductor.
Boost Fl yi ng C ap aci tor C onnecti on of C onver ter A. The M AX 17017 i ncl ud es an i nter nal b oost sw i tch/d i od e
connected b etw een V
Low-Side Gate-Driver Output for the Main Switching Regulator. DLA swings from GND to V
Inductor Connection for the Internal 3A Step-Down Converter. Connect LXB to the switched side of the
inductor.
Boost Flying Capacitor Connection for the Internal 3A Step-Down Converter. The MAX17017 includes an
internal boost switch/diode connected between V
in Figure 1.
Open-Drain Power-Good Output for the Internal 3A Step-Down Converter. POKB is low if FBB is more than
12% (typ) above or below the nominal 0.75V feedback-regulation threshold. POKB is held low during soft-
start and in shutdown. POKB becomes high impedance when FBB is in regulation.
CC
: RegA = 250kHz, RegB = 500kHz, RegC = 250kHz
DD
and BS TA. C onnect to an exter nal cap aci tor as show n i n Fi g ur e 1.
CC
powers all the analog control blocks (error amplifiers, current-sense amplifiers,
Quad-Output Controller for
Low-Power Architecture
FUNCTION
DD
CC
and BSTB. Connect to an external capacitor as shown
CC
to the 5V system supply with a series 10_ resistor,
).
Pin Description (continued)
CC
).
DD
.
CC
),
15