ADP3207
Rev. 1 | Page 4 of 29 | www.onsemi.com
Parameter Symbol Conditions Min Typ Max Units
CURRENT BALANCE AMPLIFIER
Common Mode Range
2
V
SW(X)CM
−600 +200 mV
Input Resistance R
SW(X)
SW
X
= 0 V 30 40 60 kΩ
Input Current I
SW(X)
SW
X
= 0 V 3 4.5 6
µA
Input Current Matching
∆I
SW(X)
SW
X
= 0 V −5 +5 %
Zero Current Switching
Threshold Voltage
V
DCM(SW1)
In DCM mode, DPRSLP = 3.3 V −6 mV
Masked Off-Time t
OFFMSKD
Measured from PWM turn-off 350 ns
CURRENT-LIMIT COMPARATOR
ILIMIT Voltage V
ILIMIT
R
ILIMIT
= 113 kΩ 1.65 1.7 1.75 V
ILIMIT Current I
ILIMIT
R
ILIMIT
= 113 kΩ −15
µA
Maximum ILIMIT Current
2
−60 µA
Current-Limit Threshold Voltage V
CL
V
CSREF
– V
CSCOMP
, R
ILIMIT
= 113 kΩ,
PSI
= 1.05 V 180 192 210 mV
V
CSREF
– V
CSCOMP
, R
ILIMIT
= 113 kΩ, 1-phase, (PWM2 =
VCC),
PSI
= GND
180 192 210 mV
V
CSREF
– V
CSCOMP
, R
ILIMIT
= 113 kΩ, 2-phase, (PWM3 =
VCC),
PSI
= GND
86 96 107 mV
V
CSREF
– V
CSCOMP
, R
ILIMIT
= 113 kΩ, 3-phase,
(neither PWM2 = VCC nor PWM3 = VCC),
PSI
= GND
55 64 72 mV
SOFT START TIMER
SS Current I
SS
During start-up, V
SS
< 1.7 V −10 −8 −6 µA
In normal mode, V
SS
= 2.0 V −48 µA
In current limit, V
SS
= 2.0 V 1.5 2 2.5 µA
SS Termination Threshold Voltage V
TH(SS)
During start-up, SS is rising 1.6 1.7 1.8
V
SS Clamp Voltage In normal mode 2.9
V
Current-Limit Latch-Off Voltage V
ILO(SS)
In current limit, SS is falling 1.6 1.7 1.8
V
SOFT TRANSIENT CONTROL
STSET Current I
SOURCE(STSET)
Fast exit from deeper sleep,
DPRSLP = 0 V, STSET = V
DAC
– 0.3 V
−8 µA
Slow exit from deeper sleep,
DPRSLP = 3.3 V, STSET = V
DAC
– 0.3 V
−2.5 µA
Slow entry to deeper sleep,
DPRSLP = 3.3 V, STSET = V
DAC
+ 0.3 V
+2.5 µA
Minimum STSET Capacitance
2
C
STSET
100 pF
Long Transient Threshold Accuracy V
OS(SSMASK)
V
OS(SSMASK)
= V
STSET
– V
DAC
170 mV
SYSTEM INTERFACE CONTROL
INPUTS
PSI
and
DPRSTP
Input Low Voltage V
IL
0.5 0.3 V
Input High Voltage V
IH
0.7 0.5 V
DPRSLP and EN
Input Low Voltage V
IL
1.3 1.0 V
Input High Voltage V
IH
2.3 1.9 V
THERMAL THROTTLING CONTROL
TTSENSE Voltage Range
2
0 5 V
TTSENSE VRTT Threshold Voltage VCC = 5 V, TTSENSE is falling 2.45 2.5 2.55 V
TTSENSE VRTT Hysteresis 50 95 mV
TTSENSE Bias Current TTSENSE = 2.6 V −2 2 µA
VRTT Output Low Voltage V
OL(VRTT)
I
VRTT(SINK)
= 400 µA 10 500 mV
VRTT Output High Voltage V
OH(VRTT)
I
VRTT(SOURCE)
= 400 µA 4 5 V
