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PDF PAM2322AGEAR Data sheet ( Hoja de datos )
| Número de pieza | PAM2322AGEAR | |
| Descripción | Dual High-Efficiency PWM Step-Down DC-DC Converter | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
PAM2322AGEAR
Dual High-Efficiency PWM Step-Down DC-DC Converter
Description
The PAM2322AGEAR is a dual step-down current-mode, DC-DC
converter. At heavy load, the constant-frequency PWM control
performs with excellent stability and transient response. To ensure
the longest battery life in portable applications, the PAM2322AGEAR
provides a power-saving Pulse-Skipping Modulation (PSM) mode to
reduce quiescent current under light load operation
Pin Assignments
The PAM2322AGEAR supports a range of input voltages from 2.7V to
5.5V, allowing the use of a single Li+/Li-polymer cell, multiple
Alkaline/NiMH cell, USB, and other standard power sources. Output 1
is a 1.8V fixed output. Output 2 is adjustable from 0.9V to VIN. Both
outputs employ an internal power switch and synchronous rectifier to
minimize external part count and realize high efficiency.
Output 1 delivers up to 1000mA output current while output 2 delivers
up to 2000mA. Each regulator has an independent enable pin.
Each output of the PAM2322AGEAR can be disabled when a logic
low is applied to the channel enable pin. During shutdown, the input is
disconnected from the output and the shutdown current is less than
0.1μA
W-FLGA2520-17
Other key features include under-voltage lockout, soft-start, hiccup
mode short circuit protection and thermal shutdown.
Features
Supply Voltage:2.7V to 5.5V
Output Current:
OUT1: 1000mA/Buck, 1.8V Fixed Output
OUT2: 2000mA/Buck
Switching Frequency:1.2MHz
Internal Synchronous Rectifier
Fast Transient Response
Fast Turn On and Turn Off
Internal Soft Start
Internal Compensation
100% Duty Cycle Operation
Power Good Indicator for OUT1
Under-Voltage Lockout
Hiccup Mode Short Circuit Protection
Thermal Shutdown
Small W-FLGA2520-17 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
PAM2322AGEAR
Document Number: DS36234 Rev. 2 - 2
1 of 13
www.diodes.com
September 2014
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
PAM2322AGEAR
Electrical Characteristics (TA= +25°C, VIN=3.3V, OUT1=1.8V, L1=1.5µH, OUT2=1.2V, L2=1.0µH, unless otherwise noted.)
PARAMETER
Input Voltage Range
UVLO Threshold
Output1 Voltage Accuracy
OUT2 Feedback Voltage
Output2 Voltage Accuracy
Current Limit
Quiescent Current
Shutdown Current
SW Leakage Current
Oscillator Frequency
Drain-Source On-State Resistance
Turn-on Time
Turn-off Time
Turn-on Pre-charge Time
Turn-off Discharge Time
High Impedance Delay
EN1/EN2 Threshold High
EN1/EN2 Threshold Low
Over Temperature Protection
OTP Hysteresis
PG Pin Trigger Delay
PG Pin Threshold (Relative to Vout)
PG Open Drain Impedance (PG=PVin)
PG Open Drain Impedance (PG=low)
SYMBOL
Test Conditions
VIN
VUVLO
VIN Rising
Hysteresis
OUT1
VFB2
OUT2
ILIM
No Load
VIN 3.0 to 3.6V, TA 0-70°C, VFB
resistors 0.25%
Output 1
Output 2
IQ No load
ISD VEN = 0V
ILSW
VEN = 0V
fOSC
RDS(ON)
IDS=100mA
Output 1
IDS=100mA
Output 2
P MOSFET
N MOSFET
P MOSFET
N MOSFET
VIN = 0 to 3.3V,Io=200mA
Ts
EN = 0 to 3.3V, Io=200mA
Toff EN = 3.3 to 0V, Io=5mA
Tchg
Tdis
EN = 0 to 3.3V, Io=200mA Vo=1.1V
to 1.2V
EN = 3.3 to 0V, Io=5mA Vo=1.2V to
1.1V
OUT1, SW1 EN1 transitions high to low
OUT2, SW2,
FB2
EN2 transitions high to low
VEH
VEL
OTP
OTH
MIN
2.7
2.35
-4
0.591
-2.7
1.0
1.2
TYP
3.3
2.5
400
0.60
1.5
3
60
1.2
120
80
50
40
150
30
90
+/-10
500K
MAX
5.5
2.65
+4
0.609
2.7
100
0.1
1
1.4
1000
300
7000
300
450
10
10
0.4
100
UNITS
V
V
mV
%
V
%
A
A
µA
µA
µA
MHz
mΩ
mΩ
mΩ
mΩ
µs
µs
µs
µs
µs
µs
V
V
°C
°C
us
%
Ω
Ω
PAM2322AGEAR
Document Number: DS36234 Rev. 2 - 2
5 of 13
www.diodes.com
September 2014
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
PAM2322AGEAR
Typical Performance Characteristics (TA= +25°C, VIN=3.3V, OUT1=1.8V, L=1.5µH, OUT2=1.2V,L=1.0µH, unless otherwise noted.)
Enable turn on
Vin=3.3V, Vout1=1.8V, Vout2=1.2V, Io1=1A, Io2=2A
Enable turn off
Vin=3.3V, Vout1=1.8V, Vout2=1.2V, Io1=1A, Io2=2A
(CH1=Enable; CH2=Vout2; CH3=Vout1; CH4=PG)
Output Ripple
Vin=3.3V, Vout2=1.2V, Io2=0A
(CH1=Enable; CH2=Vout2; CH3=Vout1; CH4=PG)
Output Ripple
Vin=3.3V, Vout2=1.2V, Io2=1A
(CH1=Switch; CH3=Output Voltage; CH4=Inductor current) (CH1=Switch; CH3=Output Voltage; CH4=Inductor current)
Output Short Protection
Vin=3.3V, Vout2=1.2V, Io2=1A
Output Short Recovery
Vin=3.3V, Vout2=1.2V, Io2=1A
(CH3=Output Voltage; CH4=Inductor Current)
PAM2322AGEAR
Document Number: DS36234 Rev. 2 - 2
(CH3=Output Voltage; CH4=Inductor Current)
11 of 13
www.diodes.com
September 2014
© Diodes Incorporated
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