ADP1853 Datasheet, PDF (3/28 Pages) Analog Devices – Synchronous, Step-Down DC-to-DC Controller

Data Sheet
ADP1853
SPECIFICATIONS
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). V_IN = 12 V. The
specifications are valid for T_J = −40°C to +125°C, unless otherwise specified. Typical values are at T_A = 25°C.
Table 1.
Parameter
POWER SUPPLY
Input Voltage
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Quiescent Current
Shutdown Current
ERROR AMPLIFIER
FB Input Bias Current
Open-Loop Gain¹
Gain-Bandwidth Product¹
TRK Input Bias Current
CURRENT SENSE AMPLIFIER GAIN
OUTPUT CHARACTERICTISTICS
Feedback Accuracy Voltage
Line Regulation of PWM
Load Regulation of PWM¹
OSCILLATOR
Frequency
SYNC Input Frequency Range¹
SYNC Input Pulse Width¹
SYNC Pin Capacitance to GND
CLKOUT Frequency Range¹
CLKOUT Pulse Duty Cycle
CLKOUT Rise and Fall Time
LINEAR REGULATOR
VCCO Output Voltage
VCCO Load Regulation
VCCO Line Regulation
VCCO Current Limit¹
VCCO Short-Circuit Current¹
VIN to VCCO Dropout Voltage²
Symbol
V_IN
UVLO_TRSH
UVLO_HYST
I_IN
I_{IN_SD}
I_FB
Test Conditions/Comments
V_IN rising
V_IN falling
EN = V_IN = 12 V, V_FB = V_CCO in forced pulse width
modulation (PWM) mode (no switching)
EN = V_IN = 12 V, V_FB = V_CCO in PSM mode
EN = GND, V_IN = 5.5 V or 20 V
I_TRK
0 V ≤ V_TRK ≤ 5 V
A_CS
Gain resistor connected to DL,
R_CSG = 47 kΩ ± 5%
Gain resistor connected to DL,
R_CSG = 22 kΩ ± 5%
Default setting, R_CSG = open
Voltage mode operation, resistor DL to PGND,
R_CSG = 100 kΩ ± 5%
V_FB
V_FB/V_IN
V_FB/V_COMP
T_J = −40°C to +85°C
T_J = −40°C to +125°C
V_COMP range = 0.9 V to 2.2 V
f_OSC
f_SYNC
t_SYNCMIN
C_SYNC
f_CLKOUT
D_CLKOUT
R_FREQ = 332 kΩ to AGND
R_FREQ = 78.7 kΩ to AGND
R_FREQ = 40.2 kΩ to AGND
FREQ to AGND
FREQ to VCCO
R_FREQ range from 332 kΩ to 40.2 kΩ
f_OSC range from 170 kHz to 1725 kHz
C_CLKOUT = 47 pF
V_DROPOUT
I_VCCO = 100 mA
I_VCCO = 0 mA to 100 mA
V_IN = 5.5 V to 20 V, I_VCCO = 20 mA
VCCO drops to 4 V from 5 V
VCCO < 0.5 V
I_VCCO = 100 mA, V_IN ≤ 5 V
Min
2.75
2.55
2.35
−100
−100
2.6
5.2
10.5
597
594
170
720
1275
240
480
170
100
170
4.7
Typ Max
20
2.65 2.75
2.45 2.50
0.2
4.2
5.7
2.5
100 200
+1
+100
80
20
+1
+100
3
3.4
6
6.8
12
13.5
0
600 603
600 606
±0.015
±0.3
200
800
1500
300
600
230
880
1725
360
720
1725
5
1725
50
10
5.0
5.3
35
10
350
370 400
0.33
Unit
V
V
V
V
mA
mA
µA
nA
dB
MHz
nA
V/V
V/V
V/V
V/V
mV
mV
%/V
%
kHz
kHz
kHz
kHz
kHz
kHz
ns
pF
kHz
%
ns
V
mV
mV
mA
mA
V
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